(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  typeof define === 'function' && define.amd ? define(factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.i18next = factory());
}(this, (function () { 'use strict';

  function _typeof(obj) {
    "@babel/helpers - typeof";

    if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
      _typeof = function _typeof(obj) {
        return typeof obj;
      };
    } else {
      _typeof = function _typeof(obj) {
        return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
      };
    }

    return _typeof(obj);
  }

  function _defineProperty(obj, key, value) {
    if (key in obj) {
      Object.defineProperty(obj, key, {
        value: value,
        enumerable: true,
        configurable: true,
        writable: true
      });
    } else {
      obj[key] = value;
    }

    return obj;
  }

  function _objectSpread(target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i] != null ? Object(arguments[i]) : {};
      var ownKeys = Object.keys(source);

      if (typeof Object.getOwnPropertySymbols === 'function') {
        ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) {
          return Object.getOwnPropertyDescriptor(source, sym).enumerable;
        }));
      }

      ownKeys.forEach(function (key) {
        _defineProperty(target, key, source[key]);
      });
    }

    return target;
  }

  function _classCallCheck(instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  }

  function _defineProperties(target, props) {
    for (var i = 0; i < props.length; i++) {
      var descriptor = props[i];
      descriptor.enumerable = descriptor.enumerable || false;
      descriptor.configurable = true;
      if ("value" in descriptor) descriptor.writable = true;
      Object.defineProperty(target, descriptor.key, descriptor);
    }
  }

  function _createClass(Constructor, protoProps, staticProps) {
    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
    if (staticProps) _defineProperties(Constructor, staticProps);
    return Constructor;
  }

  function _assertThisInitialized(self) {
    if (self === void 0) {
      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
    }

    return self;
  }

  function _possibleConstructorReturn(self, call) {
    if (call && (_typeof(call) === "object" || typeof call === "function")) {
      return call;
    }

    return _assertThisInitialized(self);
  }

  function _getPrototypeOf(o) {
    _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
      return o.__proto__ || Object.getPrototypeOf(o);
    };
    return _getPrototypeOf(o);
  }

  function _setPrototypeOf(o, p) {
    _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
      o.__proto__ = p;
      return o;
    };

    return _setPrototypeOf(o, p);
  }

  function _inherits(subClass, superClass) {
    if (typeof superClass !== "function" && superClass !== null) {
      throw new TypeError("Super expression must either be null or a function");
    }

    subClass.prototype = Object.create(superClass && superClass.prototype, {
      constructor: {
        value: subClass,
        writable: true,
        configurable: true
      }
    });
    if (superClass) _setPrototypeOf(subClass, superClass);
  }

  var consoleLogger = {
    type: 'logger',
    log: function log(args) {
      this.output('log', args);
    },
    warn: function warn(args) {
      this.output('warn', args);
    },
    error: function error(args) {
      this.output('error', args);
    },
    output: function output(type, args) {
      if (console && console[type]) console[type].apply(console, args);
    }
  };

  var Logger = function () {
    function Logger(concreteLogger) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

      _classCallCheck(this, Logger);

      this.init(concreteLogger, options);
    }

    _createClass(Logger, [{
      key: "init",
      value: function init(concreteLogger) {
        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
        this.prefix = options.prefix || 'i18next:';
        this.logger = concreteLogger || consoleLogger;
        this.options = options;
        this.debug = options.debug;
      }
    }, {
      key: "setDebug",
      value: function setDebug(bool) {
        this.debug = bool;
      }
    }, {
      key: "log",
      value: function log() {
        for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }

        return this.forward(args, 'log', '', true);
      }
    }, {
      key: "warn",
      value: function warn() {
        for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
          args[_key2] = arguments[_key2];
        }

        return this.forward(args, 'warn', '', true);
      }
    }, {
      key: "error",
      value: function error() {
        for (var _len3 = arguments.length, args = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
          args[_key3] = arguments[_key3];
        }

        return this.forward(args, 'error', '');
      }
    }, {
      key: "deprecate",
      value: function deprecate() {
        for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
          args[_key4] = arguments[_key4];
        }

        return this.forward(args, 'warn', 'WARNING DEPRECATED: ', true);
      }
    }, {
      key: "forward",
      value: function forward(args, lvl, prefix, debugOnly) {
        if (debugOnly && !this.debug) return null;
        if (typeof args[0] === 'string') args[0] = "".concat(prefix).concat(this.prefix, " ").concat(args[0]);
        return this.logger[lvl](args);
      }
    }, {
      key: "create",
      value: function create(moduleName) {
        return new Logger(this.logger, _objectSpread({}, {
          prefix: "".concat(this.prefix, ":").concat(moduleName, ":")
        }, this.options));
      }
    }]);

    return Logger;
  }();

  var baseLogger = new Logger();

  var EventEmitter = function () {
    function EventEmitter() {
      _classCallCheck(this, EventEmitter);

      this.observers = {};
    }

    _createClass(EventEmitter, [{
      key: "on",
      value: function on(events, listener) {
        var _this = this;

        events.split(' ').forEach(function (event) {
          _this.observers[event] = _this.observers[event] || [];

          _this.observers[event].push(listener);
        });
        return this;
      }
    }, {
      key: "off",
      value: function off(event, listener) {
        if (!this.observers[event]) return;

        if (!listener) {
          delete this.observers[event];
          return;
        }

        this.observers[event] = this.observers[event].filter(function (l) {
          return l !== listener;
        });
      }
    }, {
      key: "emit",
      value: function emit(event) {
        for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
          args[_key - 1] = arguments[_key];
        }

        if (this.observers[event]) {
          var cloned = [].concat(this.observers[event]);
          cloned.forEach(function (observer) {
            observer.apply(void 0, args);
          });
        }

        if (this.observers['*']) {
          var _cloned = [].concat(this.observers['*']);

          _cloned.forEach(function (observer) {
            observer.apply(observer, [event].concat(args));
          });
        }
      }
    }]);

    return EventEmitter;
  }();

  function defer() {
    var res;
    var rej;
    var promise = new Promise(function (resolve, reject) {
      res = resolve;
      rej = reject;
    });
    promise.resolve = res;
    promise.reject = rej;
    return promise;
  }
  function makeString(object) {
    if (object == null) return '';
    return '' + object;
  }
  function copy(a, s, t) {
    a.forEach(function (m) {
      if (s[m]) t[m] = s[m];
    });
  }

  function getLastOfPath(object, path, Empty) {
    function cleanKey(key) {
      return key && key.indexOf('###') > -1 ? key.replace(/###/g, '.') : key;
    }

    function canNotTraverseDeeper() {
      return !object || typeof object === 'string';
    }

    var stack = typeof path !== 'string' ? [].concat(path) : path.split('.');

    while (stack.length > 1) {
      if (canNotTraverseDeeper()) return {};
      var key = cleanKey(stack.shift());
      if (!object[key] && Empty) object[key] = new Empty();

      if (Object.prototype.hasOwnProperty.call(object, key)) {
        object = object[key];
      } else {
        object = {};
      }
    }

    if (canNotTraverseDeeper()) return {};
    return {
      obj: object,
      k: cleanKey(stack.shift())
    };
  }

  function setPath(object, path, newValue) {
    var _getLastOfPath = getLastOfPath(object, path, Object),
        obj = _getLastOfPath.obj,
        k = _getLastOfPath.k;

    obj[k] = newValue;
  }
  function pushPath(object, path, newValue, concat) {
    var _getLastOfPath2 = getLastOfPath(object, path, Object),
        obj = _getLastOfPath2.obj,
        k = _getLastOfPath2.k;

    obj[k] = obj[k] || [];
    if (concat) obj[k] = obj[k].concat(newValue);
    if (!concat) obj[k].push(newValue);
  }
  function getPath(object, path) {
    var _getLastOfPath3 = getLastOfPath(object, path),
        obj = _getLastOfPath3.obj,
        k = _getLastOfPath3.k;

    if (!obj) return undefined;
    return obj[k];
  }
  function getPathWithDefaults(data, defaultData, key) {
    var value = getPath(data, key);

    if (value !== undefined) {
      return value;
    }

    return getPath(defaultData, key);
  }
  function deepExtend(target, source, overwrite) {
    for (var prop in source) {
      if (prop !== '__proto__' && prop !== 'constructor') {
        if (prop in target) {
          if (typeof target[prop] === 'string' || target[prop] instanceof String || typeof source[prop] === 'string' || source[prop] instanceof String) {
            if (overwrite) target[prop] = source[prop];
          } else {
            deepExtend(target[prop], source[prop], overwrite);
          }
        } else {
          target[prop] = source[prop];
        }
      }
    }

    return target;
  }
  function regexEscape(str) {
    return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, '\\$&');
  }
  var _entityMap = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#39;',
    '/': '&#x2F;'
  };
  function escape(data) {
    if (typeof data === 'string') {
      return data.replace(/[&<>"'\/]/g, function (s) {
        return _entityMap[s];
      });
    }

    return data;
  }
  var isIE10 = typeof window !== 'undefined' && window.navigator && window.navigator.userAgent && window.navigator.userAgent.indexOf('MSIE') > -1;

  function deepFind(obj, path) {
    var keySeparator = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '.';
    if (!obj) return undefined;
    if (obj[path]) return obj[path];
    var paths = path.split(keySeparator);
    var current = obj;

    for (var i = 0; i < paths.length; ++i) {
      if (typeof current[paths[i]] === 'string' && i + 1 < paths.length) {
        return undefined;
      }

      if (current[paths[i]] === undefined) {
        var j = 2;
        var p = paths.slice(i, i + j).join(keySeparator);
        var mix = current[p];

        while (mix === undefined && paths.length > i + j) {
          j++;
          p = paths.slice(i, i + j).join(keySeparator);
          mix = current[p];
        }

        if (mix === undefined) return undefined;
        if (typeof mix === 'string') return mix;
        if (p && typeof mix[p] === 'string') return mix[p];
        var joinedPath = paths.slice(i + j).join(keySeparator);
        if (joinedPath) return deepFind(mix, joinedPath, keySeparator);
        return undefined;
      }

      current = current[paths[i]];
    }

    return current;
  }

  var ResourceStore = function (_EventEmitter) {
    _inherits(ResourceStore, _EventEmitter);

    function ResourceStore(data) {
      var _this;

      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
        ns: ['translation'],
        defaultNS: 'translation'
      };

      _classCallCheck(this, ResourceStore);

      _this = _possibleConstructorReturn(this, _getPrototypeOf(ResourceStore).call(this));

      if (isIE10) {
        EventEmitter.call(_assertThisInitialized(_this));
      }

      _this.data = data || {};
      _this.options = options;

      if (_this.options.keySeparator === undefined) {
        _this.options.keySeparator = '.';
      }

      if (_this.options.ignoreJSONStructure === undefined) {
        _this.options.ignoreJSONStructure = true;
      }

      return _this;
    }

    _createClass(ResourceStore, [{
      key: "addNamespaces",
      value: function addNamespaces(ns) {
        if (this.options.ns.indexOf(ns) < 0) {
          this.options.ns.push(ns);
        }
      }
    }, {
      key: "removeNamespaces",
      value: function removeNamespaces(ns) {
        var index = this.options.ns.indexOf(ns);

        if (index > -1) {
          this.options.ns.splice(index, 1);
        }
      }
    }, {
      key: "getResource",
      value: function getResource(lng, ns, key) {
        var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
        var keySeparator = options.keySeparator !== undefined ? options.keySeparator : this.options.keySeparator;
        var ignoreJSONStructure = options.ignoreJSONStructure !== undefined ? options.ignoreJSONStructure : this.options.ignoreJSONStructure;
        var path = [lng, ns];
        if (key && typeof key !== 'string') path = path.concat(key);
        if (key && typeof key === 'string') path = path.concat(keySeparator ? key.split(keySeparator) : key);

        if (lng.indexOf('.') > -1) {
          path = lng.split('.');
        }

        var result = getPath(this.data, path);
        if (result || !ignoreJSONStructure || typeof key !== 'string') return result;
        return deepFind(this.data && this.data[lng] && this.data[lng][ns], key, keySeparator);
      }
    }, {
      key: "addResource",
      value: function addResource(lng, ns, key, value) {
        var options = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : {
          silent: false
        };
        var keySeparator = this.options.keySeparator;
        if (keySeparator === undefined) keySeparator = '.';
        var path = [lng, ns];
        if (key) path = path.concat(keySeparator ? key.split(keySeparator) : key);

        if (lng.indexOf('.') > -1) {
          path = lng.split('.');
          value = ns;
          ns = path[1];
        }

        this.addNamespaces(ns);
        setPath(this.data, path, value);
        if (!options.silent) this.emit('added', lng, ns, key, value);
      }
    }, {
      key: "addResources",
      value: function addResources(lng, ns, resources) {
        var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {
          silent: false
        };

        for (var m in resources) {
          if (typeof resources[m] === 'string' || Object.prototype.toString.apply(resources[m]) === '[object Array]') this.addResource(lng, ns, m, resources[m], {
            silent: true
          });
        }

        if (!options.silent) this.emit('added', lng, ns, resources);
      }
    }, {
      key: "addResourceBundle",
      value: function addResourceBundle(lng, ns, resources, deep, overwrite) {
        var options = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : {
          silent: false
        };
        var path = [lng, ns];

        if (lng.indexOf('.') > -1) {
          path = lng.split('.');
          deep = resources;
          resources = ns;
          ns = path[1];
        }

        this.addNamespaces(ns);
        var pack = getPath(this.data, path) || {};

        if (deep) {
          deepExtend(pack, resources, overwrite);
        } else {
          pack = _objectSpread({}, pack, resources);
        }

        setPath(this.data, path, pack);
        if (!options.silent) this.emit('added', lng, ns, resources);
      }
    }, {
      key: "removeResourceBundle",
      value: function removeResourceBundle(lng, ns) {
        if (this.hasResourceBundle(lng, ns)) {
          delete this.data[lng][ns];
        }

        this.removeNamespaces(ns);
        this.emit('removed', lng, ns);
      }
    }, {
      key: "hasResourceBundle",
      value: function hasResourceBundle(lng, ns) {
        return this.getResource(lng, ns) !== undefined;
      }
    }, {
      key: "getResourceBundle",
      value: function getResourceBundle(lng, ns) {
        if (!ns) ns = this.options.defaultNS;
        if (this.options.compatibilityAPI === 'v1') return _objectSpread({}, {}, this.getResource(lng, ns));
        return this.getResource(lng, ns);
      }
    }, {
      key: "getDataByLanguage",
      value: function getDataByLanguage(lng) {
        return this.data[lng];
      }
    }, {
      key: "toJSON",
      value: function toJSON() {
        return this.data;
      }
    }]);

    return ResourceStore;
  }(EventEmitter);

  var postProcessor = {
    processors: {},
    addPostProcessor: function addPostProcessor(module) {
      this.processors[module.name] = module;
    },
    handle: function handle(processors, value, key, options, translator) {
      var _this = this;

      processors.forEach(function (processor) {
        if (_this.processors[processor]) value = _this.processors[processor].process(value, key, options, translator);
      });
      return value;
    }
  };

  var checkedLoadedFor = {};

  var Translator = function (_EventEmitter) {
    _inherits(Translator, _EventEmitter);

    function Translator(services) {
      var _this;

      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

      _classCallCheck(this, Translator);

      _this = _possibleConstructorReturn(this, _getPrototypeOf(Translator).call(this));

      if (isIE10) {
        EventEmitter.call(_assertThisInitialized(_this));
      }

      copy(['resourceStore', 'languageUtils', 'pluralResolver', 'interpolator', 'backendConnector', 'i18nFormat', 'utils'], services, _assertThisInitialized(_this));
      _this.options = options;

      if (_this.options.keySeparator === undefined) {
        _this.options.keySeparator = '.';
      }

      _this.logger = baseLogger.create('translator');
      return _this;
    }

    _createClass(Translator, [{
      key: "changeLanguage",
      value: function changeLanguage(lng) {
        if (lng) this.language = lng;
      }
    }, {
      key: "exists",
      value: function exists(key) {
        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
          interpolation: {}
        };
        var resolved = this.resolve(key, options);
        return resolved && resolved.res !== undefined;
      }
    }, {
      key: "extractFromKey",
      value: function extractFromKey(key, options) {
        var nsSeparator = options.nsSeparator !== undefined ? options.nsSeparator : this.options.nsSeparator;
        if (nsSeparator === undefined) nsSeparator = ':';
        var keySeparator = options.keySeparator !== undefined ? options.keySeparator : this.options.keySeparator;
        var namespaces = options.ns || this.options.defaultNS;

        if (nsSeparator && key.indexOf(nsSeparator) > -1) {
          var m = key.match(this.interpolator.nestingRegexp);

          if (m && m.length > 0) {
            return {
              key: key,
              namespaces: namespaces
            };
          }

          var parts = key.split(nsSeparator);
          if (nsSeparator !== keySeparator || nsSeparator === keySeparator && this.options.ns.indexOf(parts[0]) > -1) namespaces = parts.shift();
          key = parts.join(keySeparator);
        }

        if (typeof namespaces === 'string') namespaces = [namespaces];
        return {
          key: key,
          namespaces: namespaces
        };
      }
    }, {
      key: "translate",
      value: function translate(keys, options, lastKey) {
        var _this2 = this;

        if (_typeof(options) !== 'object' && this.options.overloadTranslationOptionHandler) {
          options = this.options.overloadTranslationOptionHandler(arguments);
        }

        if (!options) options = {};
        if (keys === undefined || keys === null) return '';
        if (!Array.isArray(keys)) keys = [String(keys)];
        var keySeparator = options.keySeparator !== undefined ? options.keySeparator : this.options.keySeparator;

        var _this$extractFromKey = this.extractFromKey(keys[keys.length - 1], options),
            key = _this$extractFromKey.key,
            namespaces = _this$extractFromKey.namespaces;

        var namespace = namespaces[namespaces.length - 1];
        var lng = options.lng || this.language;
        var appendNamespaceToCIMode = options.appendNamespaceToCIMode || this.options.appendNamespaceToCIMode;

        if (lng && lng.toLowerCase() === 'cimode') {
          if (appendNamespaceToCIMode) {
            var nsSeparator = options.nsSeparator || this.options.nsSeparator;
            return namespace + nsSeparator + key;
          }

          return key;
        }

        var resolved = this.resolve(keys, options);
        var res = resolved && resolved.res;
        var resUsedKey = resolved && resolved.usedKey || key;
        var resExactUsedKey = resolved && resolved.exactUsedKey || key;
        var resType = Object.prototype.toString.apply(res);
        var noObject = ['[object Number]', '[object Function]', '[object RegExp]'];
        var joinArrays = options.joinArrays !== undefined ? options.joinArrays : this.options.joinArrays;
        var handleAsObjectInI18nFormat = !this.i18nFormat || this.i18nFormat.handleAsObject;
        var handleAsObject = typeof res !== 'string' && typeof res !== 'boolean' && typeof res !== 'number';

        if (handleAsObjectInI18nFormat && res && handleAsObject && noObject.indexOf(resType) < 0 && !(typeof joinArrays === 'string' && resType === '[object Array]')) {
          if (!options.returnObjects && !this.options.returnObjects) {
            if (!this.options.returnedObjectHandler) {
              this.logger.warn('accessing an object - but returnObjects options is not enabled!');
            }

            return this.options.returnedObjectHandler ? this.options.returnedObjectHandler(resUsedKey, res, _objectSpread({}, options, {
              ns: namespaces
            })) : "key '".concat(key, " (").concat(this.language, ")' returned an object instead of string.");
          }

          if (keySeparator) {
            var resTypeIsArray = resType === '[object Array]';
            var copy = resTypeIsArray ? [] : {};
            var newKeyToUse = resTypeIsArray ? resExactUsedKey : resUsedKey;

            for (var m in res) {
              if (Object.prototype.hasOwnProperty.call(res, m)) {
                var deepKey = "".concat(newKeyToUse).concat(keySeparator).concat(m);
                copy[m] = this.translate(deepKey, _objectSpread({}, options, {
                  joinArrays: false,
                  ns: namespaces
                }));
                if (copy[m] === deepKey) copy[m] = res[m];
              }
            }

            res = copy;
          }
        } else if (handleAsObjectInI18nFormat && typeof joinArrays === 'string' && resType === '[object Array]') {
          res = res.join(joinArrays);
          if (res) res = this.extendTranslation(res, keys, options, lastKey);
        } else {
          var usedDefault = false;
          var usedKey = false;
          var needsPluralHandling = options.count !== undefined && typeof options.count !== 'string';
          var hasDefaultValue = Translator.hasDefaultValue(options);
          var defaultValueSuffix = needsPluralHandling ? this.pluralResolver.getSuffix(lng, options.count) : '';
          var defaultValue = options["defaultValue".concat(defaultValueSuffix)] || options.defaultValue;

          if (!this.isValidLookup(res) && hasDefaultValue) {
            usedDefault = true;
            res = defaultValue;
          }

          if (!this.isValidLookup(res)) {
            usedKey = true;
            res = key;
          }

          var updateMissing = hasDefaultValue && defaultValue !== res && this.options.updateMissing;

          if (usedKey || usedDefault || updateMissing) {
            this.logger.log(updateMissing ? 'updateKey' : 'missingKey', lng, namespace, key, updateMissing ? defaultValue : res);

            if (keySeparator) {
              var fk = this.resolve(key, _objectSpread({}, options, {
                keySeparator: false
              }));
              if (fk && fk.res) this.logger.warn('Seems the loaded translations were in flat JSON format instead of nested. Either set keySeparator: false on init or make sure your translations are published in nested format.');
            }

            var lngs = [];
            var fallbackLngs = this.languageUtils.getFallbackCodes(this.options.fallbackLng, options.lng || this.language);

            if (this.options.saveMissingTo === 'fallback' && fallbackLngs && fallbackLngs[0]) {
              for (var i = 0; i < fallbackLngs.length; i++) {
                lngs.push(fallbackLngs[i]);
              }
            } else if (this.options.saveMissingTo === 'all') {
              lngs = this.languageUtils.toResolveHierarchy(options.lng || this.language);
            } else {
              lngs.push(options.lng || this.language);
            }

            var send = function send(l, k, fallbackValue) {
              if (_this2.options.missingKeyHandler) {
                _this2.options.missingKeyHandler(l, namespace, k, updateMissing ? fallbackValue : res, updateMissing, options);
              } else if (_this2.backendConnector && _this2.backendConnector.saveMissing) {
                _this2.backendConnector.saveMissing(l, namespace, k, updateMissing ? fallbackValue : res, updateMissing, options);
              }

              _this2.emit('missingKey', l, namespace, k, res);
            };

            if (this.options.saveMissing) {
              if (this.options.saveMissingPlurals && needsPluralHandling) {
                lngs.forEach(function (language) {
                  _this2.pluralResolver.getSuffixes(language).forEach(function (suffix) {
                    send([language], key + suffix, options["defaultValue".concat(suffix)] || defaultValue);
                  });
                });
              } else {
                send(lngs, key, defaultValue);
              }
            }
          }

          res = this.extendTranslation(res, keys, options, resolved, lastKey);
          if (usedKey && res === key && this.options.appendNamespaceToMissingKey) res = "".concat(namespace, ":").concat(key);
          if (usedKey && this.options.parseMissingKeyHandler) res = this.options.parseMissingKeyHandler(res);
        }

        return res;
      }
    }, {
      key: "extendTranslation",
      value: function extendTranslation(res, key, options, resolved, lastKey) {
        var _this3 = this;

        if (this.i18nFormat && this.i18nFormat.parse) {
          res = this.i18nFormat.parse(res, options, resolved.usedLng, resolved.usedNS, resolved.usedKey, {
            resolved: resolved
          });
        } else if (!options.skipInterpolation) {
          if (options.interpolation) this.interpolator.init(_objectSpread({}, options, {
            interpolation: _objectSpread({}, this.options.interpolation, options.interpolation)
          }));
          var skipOnVariables = options.interpolation && options.interpolation.skipOnVariables || this.options.interpolation.skipOnVariables;
          var nestBef;

          if (skipOnVariables) {
            var nb = res.match(this.interpolator.nestingRegexp);
            nestBef = nb && nb.length;
          }

          var data = options.replace && typeof options.replace !== 'string' ? options.replace : options;
          if (this.options.interpolation.defaultVariables) data = _objectSpread({}, this.options.interpolation.defaultVariables, data);
          res = this.interpolator.interpolate(res, data, options.lng || this.language, options);

          if (skipOnVariables) {
            var na = res.match(this.interpolator.nestingRegexp);
            var nestAft = na && na.length;
            if (nestBef < nestAft) options.nest = false;
          }

          if (options.nest !== false) res = this.interpolator.nest(res, function () {
            for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
              args[_key] = arguments[_key];
            }

            if (lastKey && lastKey[0] === args[0] && !options.context) {
              _this3.logger.warn("It seems you are nesting recursively key: ".concat(args[0], " in key: ").concat(key[0]));

              return null;
            }

            return _this3.translate.apply(_this3, args.concat([key]));
          }, options);
          if (options.interpolation) this.interpolator.reset();
        }

        var postProcess = options.postProcess || this.options.postProcess;
        var postProcessorNames = typeof postProcess === 'string' ? [postProcess] : postProcess;

        if (res !== undefined && res !== null && postProcessorNames && postProcessorNames.length && options.applyPostProcessor !== false) {
          res = postProcessor.handle(postProcessorNames, res, key, this.options && this.options.postProcessPassResolved ? _objectSpread({
            i18nResolved: resolved
          }, options) : options, this);
        }

        return res;
      }
    }, {
      key: "resolve",
      value: function resolve(keys) {
        var _this4 = this;

        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
        var found;
        var usedKey;
        var exactUsedKey;
        var usedLng;
        var usedNS;
        if (typeof keys === 'string') keys = [keys];
        keys.forEach(function (k) {
          if (_this4.isValidLookup(found)) return;

          var extracted = _this4.extractFromKey(k, options);

          var key = extracted.key;
          usedKey = key;
          var namespaces = extracted.namespaces;
          if (_this4.options.fallbackNS) namespaces = namespaces.concat(_this4.options.fallbackNS);
          var needsPluralHandling = options.count !== undefined && typeof options.count !== 'string';
          var needsContextHandling = options.context !== undefined && (typeof options.context === 'string' || typeof options.context === 'number') && options.context !== '';
          var codes = options.lngs ? options.lngs : _this4.languageUtils.toResolveHierarchy(options.lng || _this4.language, options.fallbackLng);
          namespaces.forEach(function (ns) {
            if (_this4.isValidLookup(found)) return;
            usedNS = ns;

            if (!checkedLoadedFor["".concat(codes[0], "-").concat(ns)] && _this4.utils && _this4.utils.hasLoadedNamespace && !_this4.utils.hasLoadedNamespace(usedNS)) {
              checkedLoadedFor["".concat(codes[0], "-").concat(ns)] = true;

              _this4.logger.warn("key \"".concat(usedKey, "\" for languages \"").concat(codes.join(', '), "\" won't get resolved as namespace \"").concat(usedNS, "\" was not yet loaded"), 'This means something IS WRONG in your setup. You access the t function before i18next.init / i18next.loadNamespace / i18next.changeLanguage was done. Wait for the callback or Promise to resolve before accessing it!!!');
            }

            codes.forEach(function (code) {
              if (_this4.isValidLookup(found)) return;
              usedLng = code;
              var finalKey = key;
              var finalKeys = [finalKey];

              if (_this4.i18nFormat && _this4.i18nFormat.addLookupKeys) {
                _this4.i18nFormat.addLookupKeys(finalKeys, key, code, ns, options);
              } else {
                var pluralSuffix;
                if (needsPluralHandling) pluralSuffix = _this4.pluralResolver.getSuffix(code, options.count);
                if (needsPluralHandling && needsContextHandling) finalKeys.push(finalKey + pluralSuffix);
                if (needsContextHandling) finalKeys.push(finalKey += "".concat(_this4.options.contextSeparator).concat(options.context));
                if (needsPluralHandling) finalKeys.push(finalKey += pluralSuffix);
              }

              var possibleKey;

              while (possibleKey = finalKeys.pop()) {
                if (!_this4.isValidLookup(found)) {
                  exactUsedKey = possibleKey;
                  found = _this4.getResource(code, ns, possibleKey, options);
                }
              }
            });
          });
        });
        return {
          res: found,
          usedKey: usedKey,
          exactUsedKey: exactUsedKey,
          usedLng: usedLng,
          usedNS: usedNS
        };
      }
    }, {
      key: "isValidLookup",
      value: function isValidLookup(res) {
        return res !== undefined && !(!this.options.returnNull && res === null) && !(!this.options.returnEmptyString && res === '');
      }
    }, {
      key: "getResource",
      value: function getResource(code, ns, key) {
        var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
        if (this.i18nFormat && this.i18nFormat.getResource) return this.i18nFormat.getResource(code, ns, key, options);
        return this.resourceStore.getResource(code, ns, key, options);
      }
    }], [{
      key: "hasDefaultValue",
      value: function hasDefaultValue(options) {
        var prefix = 'defaultValue';

        for (var option in options) {
          if (Object.prototype.hasOwnProperty.call(options, option) && prefix === option.substring(0, prefix.length) && undefined !== options[option]) {
            return true;
          }
        }

        return false;
      }
    }]);

    return Translator;
  }(EventEmitter);

  function capitalize(string) {
    return string.charAt(0).toUpperCase() + string.slice(1);
  }

  var LanguageUtil = function () {
    function LanguageUtil(options) {
      _classCallCheck(this, LanguageUtil);

      this.options = options;
      this.whitelist = this.options.supportedLngs || false;
      this.supportedLngs = this.options.supportedLngs || false;
      this.logger = baseLogger.create('languageUtils');
    }

    _createClass(LanguageUtil, [{
      key: "getScriptPartFromCode",
      value: function getScriptPartFromCode(code) {
        if (!code || code.indexOf('-') < 0) return null;
        var p = code.split('-');
        if (p.length === 2) return null;
        p.pop();
        if (p[p.length - 1].toLowerCase() === 'x') return null;
        return this.formatLanguageCode(p.join('-'));
      }
    }, {
      key: "getLanguagePartFromCode",
      value: function getLanguagePartFromCode(code) {
        if (!code || code.indexOf('-') < 0) return code;
        var p = code.split('-');
        return this.formatLanguageCode(p[0]);
      }
    }, {
      key: "formatLanguageCode",
      value: function formatLanguageCode(code) {
        if (typeof code === 'string' && code.indexOf('-') > -1) {
          var specialCases = ['hans', 'hant', 'latn', 'cyrl', 'cans', 'mong', 'arab'];
          var p = code.split('-');

          if (this.options.lowerCaseLng) {
            p = p.map(function (part) {
              return part.toLowerCase();
            });
          } else if (p.length === 2) {
            p[0] = p[0].toLowerCase();
            p[1] = p[1].toUpperCase();
            if (specialCases.indexOf(p[1].toLowerCase()) > -1) p[1] = capitalize(p[1].toLowerCase());
          } else if (p.length === 3) {
            p[0] = p[0].toLowerCase();
            if (p[1].length === 2) p[1] = p[1].toUpperCase();
            if (p[0] !== 'sgn' && p[2].length === 2) p[2] = p[2].toUpperCase();
            if (specialCases.indexOf(p[1].toLowerCase()) > -1) p[1] = capitalize(p[1].toLowerCase());
            if (specialCases.indexOf(p[2].toLowerCase()) > -1) p[2] = capitalize(p[2].toLowerCase());
          }

          return p.join('-');
        }

        return this.options.cleanCode || this.options.lowerCaseLng ? code.toLowerCase() : code;
      }
    }, {
      key: "isWhitelisted",
      value: function isWhitelisted(code) {
        this.logger.deprecate('languageUtils.isWhitelisted', 'function "isWhitelisted" will be renamed to "isSupportedCode" in the next major - please make sure to rename it\'s usage asap.');
        return this.isSupportedCode(code);
      }
    }, {
      key: "isSupportedCode",
      value: function isSupportedCode(code) {
        if (this.options.load === 'languageOnly' || this.options.nonExplicitSupportedLngs) {
          code = this.getLanguagePartFromCode(code);
        }

        return !this.supportedLngs || !this.supportedLngs.length || this.supportedLngs.indexOf(code) > -1;
      }
    }, {
      key: "getBestMatchFromCodes",
      value: function getBestMatchFromCodes(codes) {
        var _this = this;

        if (!codes) return null;
        var found;
        codes.forEach(function (code) {
          if (found) return;

          var cleanedLng = _this.formatLanguageCode(code);

          if (!_this.options.supportedLngs || _this.isSupportedCode(cleanedLng)) found = cleanedLng;
        });

        if (!found && this.options.supportedLngs) {
          codes.forEach(function (code) {
            if (found) return;

            var lngOnly = _this.getLanguagePartFromCode(code);

            if (_this.isSupportedCode(lngOnly)) return found = lngOnly;
            found = _this.options.supportedLngs.find(function (supportedLng) {
              if (supportedLng.indexOf(lngOnly) === 0) return supportedLng;
            });
          });
        }

        if (!found) found = this.getFallbackCodes(this.options.fallbackLng)[0];
        return found;
      }
    }, {
      key: "getFallbackCodes",
      value: function getFallbackCodes(fallbacks, code) {
        if (!fallbacks) return [];
        if (typeof fallbacks === 'function') fallbacks = fallbacks(code);
        if (typeof fallbacks === 'string') fallbacks = [fallbacks];
        if (Object.prototype.toString.apply(fallbacks) === '[object Array]') return fallbacks;
        if (!code) return fallbacks["default"] || [];
        var found = fallbacks[code];
        if (!found) found = fallbacks[this.getScriptPartFromCode(code)];
        if (!found) found = fallbacks[this.formatLanguageCode(code)];
        if (!found) found = fallbacks[this.getLanguagePartFromCode(code)];
        if (!found) found = fallbacks["default"];
        return found || [];
      }
    }, {
      key: "toResolveHierarchy",
      value: function toResolveHierarchy(code, fallbackCode) {
        var _this2 = this;

        var fallbackCodes = this.getFallbackCodes(fallbackCode || this.options.fallbackLng || [], code);
        var codes = [];

        var addCode = function addCode(c) {
          if (!c) return;

          if (_this2.isSupportedCode(c)) {
            codes.push(c);
          } else {
            _this2.logger.warn("rejecting language code not found in supportedLngs: ".concat(c));
          }
        };

        if (typeof code === 'string' && code.indexOf('-') > -1) {
          if (this.options.load !== 'languageOnly') addCode(this.formatLanguageCode(code));
          if (this.options.load !== 'languageOnly' && this.options.load !== 'currentOnly') addCode(this.getScriptPartFromCode(code));
          if (this.options.load !== 'currentOnly') addCode(this.getLanguagePartFromCode(code));
        } else if (typeof code === 'string') {
          addCode(this.formatLanguageCode(code));
        }

        fallbackCodes.forEach(function (fc) {
          if (codes.indexOf(fc) < 0) addCode(_this2.formatLanguageCode(fc));
        });
        return codes;
      }
    }]);

    return LanguageUtil;
  }();

  var sets = [{
    lngs: ['ach', 'ak', 'am', 'arn', 'br', 'fil', 'gun', 'ln', 'mfe', 'mg', 'mi', 'oc', 'pt', 'pt-BR', 'tg', 'tl', 'ti', 'tr', 'uz', 'wa'],
    nr: [1, 2],
    fc: 1
  }, {
    lngs: ['af', 'an', 'ast', 'az', 'bg', 'bn', 'ca', 'da', 'de', 'dev', 'el', 'en', 'eo', 'es', 'et', 'eu', 'fi', 'fo', 'fur', 'fy', 'gl', 'gu', 'ha', 'hi', 'hu', 'hy', 'ia', 'it', 'kk', 'kn', 'ku', 'lb', 'mai', 'ml', 'mn', 'mr', 'nah', 'nap', 'nb', 'ne', 'nl', 'nn', 'no', 'nso', 'pa', 'pap', 'pms', 'ps', 'pt-PT', 'rm', 'sco', 'se', 'si', 'so', 'son', 'sq', 'sv', 'sw', 'ta', 'te', 'tk', 'ur', 'yo'],
    nr: [1, 2],
    fc: 2
  }, {
    lngs: ['ay', 'bo', 'cgg', 'fa', 'ht', 'id', 'ja', 'jbo', 'ka', 'km', 'ko', 'ky', 'lo', 'ms', 'sah', 'su', 'th', 'tt', 'ug', 'vi', 'wo', 'zh'],
    nr: [1],
    fc: 3
  }, {
    lngs: ['be', 'bs', 'cnr', 'dz', 'hr', 'ru', 'sr', 'uk'],
    nr: [1, 2, 5],
    fc: 4
  }, {
    lngs: ['ar'],
    nr: [0, 1, 2, 3, 11, 100],
    fc: 5
  }, {
    lngs: ['cs', 'sk'],
    nr: [1, 2, 5],
    fc: 6
  }, {
    lngs: ['csb', 'pl'],
    nr: [1, 2, 5],
    fc: 7
  }, {
    lngs: ['cy'],
    nr: [1, 2, 3, 8],
    fc: 8
  }, {
    lngs: ['fr'],
    nr: [1, 2],
    fc: 9
  }, {
    lngs: ['ga'],
    nr: [1, 2, 3, 7, 11],
    fc: 10
  }, {
    lngs: ['gd'],
    nr: [1, 2, 3, 20],
    fc: 11
  }, {
    lngs: ['is'],
    nr: [1, 2],
    fc: 12
  }, {
    lngs: ['jv'],
    nr: [0, 1],
    fc: 13
  }, {
    lngs: ['kw'],
    nr: [1, 2, 3, 4],
    fc: 14
  }, {
    lngs: ['lt'],
    nr: [1, 2, 10],
    fc: 15
  }, {
    lngs: ['lv'],
    nr: [1, 2, 0],
    fc: 16
  }, {
    lngs: ['mk'],
    nr: [1, 2],
    fc: 17
  }, {
    lngs: ['mnk'],
    nr: [0, 1, 2],
    fc: 18
  }, {
    lngs: ['mt'],
    nr: [1, 2, 11, 20],
    fc: 19
  }, {
    lngs: ['or'],
    nr: [2, 1],
    fc: 2
  }, {
    lngs: ['ro'],
    nr: [1, 2, 20],
    fc: 20
  }, {
    lngs: ['sl'],
    nr: [5, 1, 2, 3],
    fc: 21
  }, {
    lngs: ['he', 'iw'],
    nr: [1, 2, 20, 21],
    fc: 22
  }];
  var _rulesPluralsTypes = {
    1: function _(n) {
      return Number(n > 1);
    },
    2: function _(n) {
      return Number(n != 1);
    },
    3: function _(n) {
      return 0;
    },
    4: function _(n) {
      return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);
    },
    5: function _(n) {
      return Number(n == 0 ? 0 : n == 1 ? 1 : n == 2 ? 2 : n % 100 >= 3 && n % 100 <= 10 ? 3 : n % 100 >= 11 ? 4 : 5);
    },
    6: function _(n) {
      return Number(n == 1 ? 0 : n >= 2 && n <= 4 ? 1 : 2);
    },
    7: function _(n) {
      return Number(n == 1 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);
    },
    8: function _(n) {
      return Number(n == 1 ? 0 : n == 2 ? 1 : n != 8 && n != 11 ? 2 : 3);
    },
    9: function _(n) {
      return Number(n >= 2);
    },
    10: function _(n) {
      return Number(n == 1 ? 0 : n == 2 ? 1 : n < 7 ? 2 : n < 11 ? 3 : 4);
    },
    11: function _(n) {
      return Number(n == 1 || n == 11 ? 0 : n == 2 || n == 12 ? 1 : n > 2 && n < 20 ? 2 : 3);
    },
    12: function _(n) {
      return Number(n % 10 != 1 || n % 100 == 11);
    },
    13: function _(n) {
      return Number(n !== 0);
    },
    14: function _(n) {
      return Number(n == 1 ? 0 : n == 2 ? 1 : n == 3 ? 2 : 3);
    },
    15: function _(n) {
      return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);
    },
    16: function _(n) {
      return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n !== 0 ? 1 : 2);
    },
    17: function _(n) {
      return Number(n == 1 || n % 10 == 1 && n % 100 != 11 ? 0 : 1);
    },
    18: function _(n) {
      return Number(n == 0 ? 0 : n == 1 ? 1 : 2);
    },
    19: function _(n) {
      return Number(n == 1 ? 0 : n == 0 || n % 100 > 1 && n % 100 < 11 ? 1 : n % 100 > 10 && n % 100 < 20 ? 2 : 3);
    },
    20: function _(n) {
      return Number(n == 1 ? 0 : n == 0 || n % 100 > 0 && n % 100 < 20 ? 1 : 2);
    },
    21: function _(n) {
      return Number(n % 100 == 1 ? 1 : n % 100 == 2 ? 2 : n % 100 == 3 || n % 100 == 4 ? 3 : 0);
    },
    22: function _(n) {
      return Number(n == 1 ? 0 : n == 2 ? 1 : (n < 0 || n > 10) && n % 10 == 0 ? 2 : 3);
    }
  };

  function createRules() {
    var rules = {};
    sets.forEach(function (set) {
      set.lngs.forEach(function (l) {
        rules[l] = {
          numbers: set.nr,
          plurals: _rulesPluralsTypes[set.fc]
        };
      });
    });
    return rules;
  }

  var PluralResolver = function () {
    function PluralResolver(languageUtils) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

      _classCallCheck(this, PluralResolver);

      this.languageUtils = languageUtils;
      this.options = options;
      this.logger = baseLogger.create('pluralResolver');
      this.rules = createRules();
    }

    _createClass(PluralResolver, [{
      key: "addRule",
      value: function addRule(lng, obj) {
        this.rules[lng] = obj;
      }
    }, {
      key: "getRule",
      value: function getRule(code) {
        return this.rules[code] || this.rules[this.languageUtils.getLanguagePartFromCode(code)];
      }
    }, {
      key: "needsPlural",
      value: function needsPlural(code) {
        var rule = this.getRule(code);
        return rule && rule.numbers.length > 1;
      }
    }, {
      key: "getPluralFormsOfKey",
      value: function getPluralFormsOfKey(code, key) {
        return this.getSuffixes(code).map(function (suffix) {
          return key + suffix;
        });
      }
    }, {
      key: "getSuffixes",
      value: function getSuffixes(code) {
        var _this = this;

        var rule = this.getRule(code);

        if (!rule) {
          return [];
        }

        return rule.numbers.map(function (number) {
          return _this.getSuffix(code, number);
        });
      }
    }, {
      key: "getSuffix",
      value: function getSuffix(code, count) {
        var _this2 = this;

        var rule = this.getRule(code);

        if (rule) {
          var idx = rule.noAbs ? rule.plurals(count) : rule.plurals(Math.abs(count));
          var suffix = rule.numbers[idx];

          if (this.options.simplifyPluralSuffix && rule.numbers.length === 2 && rule.numbers[0] === 1) {
            if (suffix === 2) {
              suffix = 'plural';
            } else if (suffix === 1) {
              suffix = '';
            }
          }

          var returnSuffix = function returnSuffix() {
            return _this2.options.prepend && suffix.toString() ? _this2.options.prepend + suffix.toString() : suffix.toString();
          };

          if (this.options.compatibilityJSON === 'v1') {
            if (suffix === 1) return '';
            if (typeof suffix === 'number') return "_plural_".concat(suffix.toString());
            return returnSuffix();
          } else if (this.options.compatibilityJSON === 'v2') {
            return returnSuffix();
          } else if (this.options.simplifyPluralSuffix && rule.numbers.length === 2 && rule.numbers[0] === 1) {
            return returnSuffix();
          }

          return this.options.prepend && idx.toString() ? this.options.prepend + idx.toString() : idx.toString();
        }

        this.logger.warn("no plural rule found for: ".concat(code));
        return '';
      }
    }]);

    return PluralResolver;
  }();

  var Interpolator = function () {
    function Interpolator() {
      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

      _classCallCheck(this, Interpolator);

      this.logger = baseLogger.create('interpolator');
      this.options = options;

      this.format = options.interpolation && options.interpolation.format || function (value) {
        return value;
      };

      this.init(options);
    }

    _createClass(Interpolator, [{
      key: "init",
      value: function init() {
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        if (!options.interpolation) options.interpolation = {
          escapeValue: true
        };
        var iOpts = options.interpolation;
        this.escape = iOpts.escape !== undefined ? iOpts.escape : escape;
        this.escapeValue = iOpts.escapeValue !== undefined ? iOpts.escapeValue : true;
        this.useRawValueToEscape = iOpts.useRawValueToEscape !== undefined ? iOpts.useRawValueToEscape : false;
        this.prefix = iOpts.prefix ? regexEscape(iOpts.prefix) : iOpts.prefixEscaped || '{{';
        this.suffix = iOpts.suffix ? regexEscape(iOpts.suffix) : iOpts.suffixEscaped || '}}';
        this.formatSeparator = iOpts.formatSeparator ? iOpts.formatSeparator : iOpts.formatSeparator || ',';
        this.unescapePrefix = iOpts.unescapeSuffix ? '' : iOpts.unescapePrefix || '-';
        this.unescapeSuffix = this.unescapePrefix ? '' : iOpts.unescapeSuffix || '';
        this.nestingPrefix = iOpts.nestingPrefix ? regexEscape(iOpts.nestingPrefix) : iOpts.nestingPrefixEscaped || regexEscape('$t(');
        this.nestingSuffix = iOpts.nestingSuffix ? regexEscape(iOpts.nestingSuffix) : iOpts.nestingSuffixEscaped || regexEscape(')');
        this.nestingOptionsSeparator = iOpts.nestingOptionsSeparator ? iOpts.nestingOptionsSeparator : iOpts.nestingOptionsSeparator || ',';
        this.maxReplaces = iOpts.maxReplaces ? iOpts.maxReplaces : 1000;
        this.alwaysFormat = iOpts.alwaysFormat !== undefined ? iOpts.alwaysFormat : false;
        this.resetRegExp();
      }
    }, {
      key: "reset",
      value: function reset() {
        if (this.options) this.init(this.options);
      }
    }, {
      key: "resetRegExp",
      value: function resetRegExp() {
        var regexpStr = "".concat(this.prefix, "(.+?)").concat(this.suffix);
        this.regexp = new RegExp(regexpStr, 'g');
        var regexpUnescapeStr = "".concat(this.prefix).concat(this.unescapePrefix, "(.+?)").concat(this.unescapeSuffix).concat(this.suffix);
        this.regexpUnescape = new RegExp(regexpUnescapeStr, 'g');
        var nestingRegexpStr = "".concat(this.nestingPrefix, "(.+?)").concat(this.nestingSuffix);
        this.nestingRegexp = new RegExp(nestingRegexpStr, 'g');
      }
    }, {
      key: "interpolate",
      value: function interpolate(str, data, lng, options) {
        var _this = this;

        var match;
        var value;
        var replaces;
        var defaultData = this.options && this.options.interpolation && this.options.interpolation.defaultVariables || {};

        function regexSafe(val) {
          return val.replace(/\$/g, '$$$$');
        }

        var handleFormat = function handleFormat(key) {
          if (key.indexOf(_this.formatSeparator) < 0) {
            var path = getPathWithDefaults(data, defaultData, key);
            return _this.alwaysFormat ? _this.format(path, undefined, lng, _objectSpread({}, options, data, {
              interpolationkey: key
            })) : path;
          }

          var p = key.split(_this.formatSeparator);
          var k = p.shift().trim();
          var f = p.join(_this.formatSeparator).trim();
          return _this.format(getPathWithDefaults(data, defaultData, k), f, lng, _objectSpread({}, options, data, {
            interpolationkey: k
          }));
        };

        this.resetRegExp();
        var missingInterpolationHandler = options && options.missingInterpolationHandler || this.options.missingInterpolationHandler;
        var skipOnVariables = options && options.interpolation && options.interpolation.skipOnVariables || this.options.interpolation.skipOnVariables;
        var todos = [{
          regex: this.regexpUnescape,
          safeValue: function safeValue(val) {
            return regexSafe(val);
          }
        }, {
          regex: this.regexp,
          safeValue: function safeValue(val) {
            return _this.escapeValue ? regexSafe(_this.escape(val)) : regexSafe(val);
          }
        }];
        todos.forEach(function (todo) {
          replaces = 0;

          while (match = todo.regex.exec(str)) {
            value = handleFormat(match[1].trim());

            if (value === undefined) {
              if (typeof missingInterpolationHandler === 'function') {
                var temp = missingInterpolationHandler(str, match, options);
                value = typeof temp === 'string' ? temp : '';
              } else if (skipOnVariables) {
                value = match[0];
                continue;
              } else {
                _this.logger.warn("missed to pass in variable ".concat(match[1], " for interpolating ").concat(str));

                value = '';
              }
            } else if (typeof value !== 'string' && !_this.useRawValueToEscape) {
              value = makeString(value);
            }

            var safeValue = todo.safeValue(value);
            str = str.replace(match[0], safeValue);

            if (skipOnVariables) {
              todo.regex.lastIndex += safeValue.length;
              todo.regex.lastIndex -= match[0].length;
            } else {
              todo.regex.lastIndex = 0;
            }

            replaces++;

            if (replaces >= _this.maxReplaces) {
              break;
            }
          }
        });
        return str;
      }
    }, {
      key: "nest",
      value: function nest(str, fc) {
        var _this2 = this;

        var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
        var match;
        var value;

        var clonedOptions = _objectSpread({}, options);

        clonedOptions.applyPostProcessor = false;
        delete clonedOptions.defaultValue;

        function handleHasOptions(key, inheritedOptions) {
          var sep = this.nestingOptionsSeparator;
          if (key.indexOf(sep) < 0) return key;
          var c = key.split(new RegExp("".concat(sep, "[ ]*{")));
          var optionsString = "{".concat(c[1]);
          key = c[0];
          optionsString = this.interpolate(optionsString, clonedOptions);
          optionsString = optionsString.replace(/'/g, '"');

          try {
            clonedOptions = JSON.parse(optionsString);
            if (inheritedOptions) clonedOptions = _objectSpread({}, inheritedOptions, clonedOptions);
          } catch (e) {
            this.logger.warn("failed parsing options string in nesting for key ".concat(key), e);
            return "".concat(key).concat(sep).concat(optionsString);
          }

          delete clonedOptions.defaultValue;
          return key;
        }

        while (match = this.nestingRegexp.exec(str)) {
          var formatters = [];
          var doReduce = false;

          if (match[0].indexOf(this.formatSeparator) !== -1 && !/{.*}/.test(match[1])) {
            var r = match[1].split(this.formatSeparator).map(function (elem) {
              return elem.trim();
            });
            match[1] = r.shift();
            formatters = r;
            doReduce = true;
          }

          value = fc(handleHasOptions.call(this, match[1].trim(), clonedOptions), clonedOptions);
          if (value && match[0] === str && typeof value !== 'string') return value;
          if (typeof value !== 'string') value = makeString(value);

          if (!value) {
            this.logger.warn("missed to resolve ".concat(match[1], " for nesting ").concat(str));
            value = '';
          }

          if (doReduce) {
            value = formatters.reduce(function (v, f) {
              return _this2.format(v, f, options.lng, _objectSpread({}, options, {
                interpolationkey: match[1].trim()
              }));
            }, value.trim());
          }

          str = str.replace(match[0], value);
          this.regexp.lastIndex = 0;
        }

        return str;
      }
    }]);

    return Interpolator;
  }();

  function remove(arr, what) {
    var found = arr.indexOf(what);

    while (found !== -1) {
      arr.splice(found, 1);
      found = arr.indexOf(what);
    }
  }

  var Connector = function (_EventEmitter) {
    _inherits(Connector, _EventEmitter);

    function Connector(backend, store, services) {
      var _this;

      var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};

      _classCallCheck(this, Connector);

      _this = _possibleConstructorReturn(this, _getPrototypeOf(Connector).call(this));

      if (isIE10) {
        EventEmitter.call(_assertThisInitialized(_this));
      }

      _this.backend = backend;
      _this.store = store;
      _this.services = services;
      _this.languageUtils = services.languageUtils;
      _this.options = options;
      _this.logger = baseLogger.create('backendConnector');
      _this.state = {};
      _this.queue = [];

      if (_this.backend && _this.backend.init) {
        _this.backend.init(services, options.backend, options);
      }

      return _this;
    }

    _createClass(Connector, [{
      key: "queueLoad",
      value: function queueLoad(languages, namespaces, options, callback) {
        var _this2 = this;

        var toLoad = [];
        var pending = [];
        var toLoadLanguages = [];
        var toLoadNamespaces = [];
        languages.forEach(function (lng) {
          var hasAllNamespaces = true;
          namespaces.forEach(function (ns) {
            var name = "".concat(lng, "|").concat(ns);

            if (!options.reload && _this2.store.hasResourceBundle(lng, ns)) {
              _this2.state[name] = 2;
            } else if (_this2.state[name] < 0) ; else if (_this2.state[name] === 1) {
              if (pending.indexOf(name) < 0) pending.push(name);
            } else {
              _this2.state[name] = 1;
              hasAllNamespaces = false;
              if (pending.indexOf(name) < 0) pending.push(name);
              if (toLoad.indexOf(name) < 0) toLoad.push(name);
              if (toLoadNamespaces.indexOf(ns) < 0) toLoadNamespaces.push(ns);
            }
          });
          if (!hasAllNamespaces) toLoadLanguages.push(lng);
        });

        if (toLoad.length || pending.length) {
          this.queue.push({
            pending: pending,
            loaded: {},
            errors: [],
            callback: callback
          });
        }

        return {
          toLoad: toLoad,
          pending: pending,
          toLoadLanguages: toLoadLanguages,
          toLoadNamespaces: toLoadNamespaces
        };
      }
    }, {
      key: "loaded",
      value: function loaded(name, err, data) {
        var s = name.split('|');
        var lng = s[0];
        var ns = s[1];
        if (err) this.emit('failedLoading', lng, ns, err);

        if (data) {
          this.store.addResourceBundle(lng, ns, data);
        }

        this.state[name] = err ? -1 : 2;
        var loaded = {};
        this.queue.forEach(function (q) {
          pushPath(q.loaded, [lng], ns);
          remove(q.pending, name);
          if (err) q.errors.push(err);

          if (q.pending.length === 0 && !q.done) {
            Object.keys(q.loaded).forEach(function (l) {
              if (!loaded[l]) loaded[l] = [];

              if (q.loaded[l].length) {
                q.loaded[l].forEach(function (ns) {
                  if (loaded[l].indexOf(ns) < 0) loaded[l].push(ns);
                });
              }
            });
            q.done = true;

            if (q.errors.length) {
              q.callback(q.errors);
            } else {
              q.callback();
            }
          }
        });
        this.emit('loaded', loaded);
        this.queue = this.queue.filter(function (q) {
          return !q.done;
        });
      }
    }, {
      key: "read",
      value: function read(lng, ns, fcName) {
        var _this3 = this;

        var tried = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 0;
        var wait = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 350;
        var callback = arguments.length > 5 ? arguments[5] : undefined;
        if (!lng.length) return callback(null, {});
        return this.backend[fcName](lng, ns, function (err, data) {
          if (err && data && tried < 5) {
            setTimeout(function () {
              _this3.read.call(_this3, lng, ns, fcName, tried + 1, wait * 2, callback);
            }, wait);
            return;
          }

          callback(err, data);
        });
      }
    }, {
      key: "prepareLoading",
      value: function prepareLoading(languages, namespaces) {
        var _this4 = this;

        var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
        var callback = arguments.length > 3 ? arguments[3] : undefined;

        if (!this.backend) {
          this.logger.warn('No backend was added via i18next.use. Will not load resources.');
          return callback && callback();
        }

        if (typeof languages === 'string') languages = this.languageUtils.toResolveHierarchy(languages);
        if (typeof namespaces === 'string') namespaces = [namespaces];
        var toLoad = this.queueLoad(languages, namespaces, options, callback);

        if (!toLoad.toLoad.length) {
          if (!toLoad.pending.length) callback();
          return null;
        }

        toLoad.toLoad.forEach(function (name) {
          _this4.loadOne(name);
        });
      }
    }, {
      key: "load",
      value: function load(languages, namespaces, callback) {
        this.prepareLoading(languages, namespaces, {}, callback);
      }
    }, {
      key: "reload",
      value: function reload(languages, namespaces, callback) {
        this.prepareLoading(languages, namespaces, {
          reload: true
        }, callback);
      }
    }, {
      key: "loadOne",
      value: function loadOne(name) {
        var _this5 = this;

        var prefix = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
        var s = name.split('|');
        var lng = s[0];
        var ns = s[1];
        this.read(lng, ns, 'read', undefined, undefined, function (err, data) {
          if (err) _this5.logger.warn("".concat(prefix, "loading namespace ").concat(ns, " for language ").concat(lng, " failed"), err);
          if (!err && data) _this5.logger.log("".concat(prefix, "loaded namespace ").concat(ns, " for language ").concat(lng), data);

          _this5.loaded(name, err, data);
        });
      }
    }, {
      key: "saveMissing",
      value: function saveMissing(languages, namespace, key, fallbackValue, isUpdate) {
        var options = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : {};

        if (this.services.utils && this.services.utils.hasLoadedNamespace && !this.services.utils.hasLoadedNamespace(namespace)) {
          this.logger.warn("did not save key \"".concat(key, "\" as the namespace \"").concat(namespace, "\" was not yet loaded"), 'This means something IS WRONG in your setup. You access the t function before i18next.init / i18next.loadNamespace / i18next.changeLanguage was done. Wait for the callback or Promise to resolve before accessing it!!!');
          return;
        }

        if (key === undefined || key === null || key === '') return;

        if (this.backend && this.backend.create) {
          this.backend.create(languages, namespace, key, fallbackValue, null, _objectSpread({}, options, {
            isUpdate: isUpdate
          }));
        }

        if (!languages || !languages[0]) return;
        this.store.addResource(languages[0], namespace, key, fallbackValue);
      }
    }]);

    return Connector;
  }(EventEmitter);

  function get() {
    return {
      debug: false,
      initImmediate: true,
      ns: ['translation'],
      defaultNS: ['translation'],
      fallbackLng: ['dev'],
      fallbackNS: false,
      whitelist: false,
      nonExplicitWhitelist: false,
      supportedLngs: false,
      nonExplicitSupportedLngs: false,
      load: 'all',
      preload: false,
      simplifyPluralSuffix: true,
      keySeparator: '.',
      nsSeparator: ':',
      pluralSeparator: '_',
      contextSeparator: '_',
      partialBundledLanguages: false,
      saveMissing: false,
      updateMissing: false,
      saveMissingTo: 'fallback',
      saveMissingPlurals: true,
      missingKeyHandler: false,
      missingInterpolationHandler: false,
      postProcess: false,
      postProcessPassResolved: false,
      returnNull: true,
      returnEmptyString: true,
      returnObjects: false,
      joinArrays: false,
      returnedObjectHandler: false,
      parseMissingKeyHandler: false,
      appendNamespaceToMissingKey: false,
      appendNamespaceToCIMode: false,
      overloadTranslationOptionHandler: function handle(args) {
        var ret = {};
        if (_typeof(args[1]) === 'object') ret = args[1];
        if (typeof args[1] === 'string') ret.defaultValue = args[1];
        if (typeof args[2] === 'string') ret.tDescription = args[2];

        if (_typeof(args[2]) === 'object' || _typeof(args[3]) === 'object') {
          var options = args[3] || args[2];
          Object.keys(options).forEach(function (key) {
            ret[key] = options[key];
          });
        }

        return ret;
      },
      interpolation: {
        escapeValue: true,
        format: function format(value, _format, lng, options) {
          return value;
        },
        prefix: '{{',
        suffix: '}}',
        formatSeparator: ',',
        unescapePrefix: '-',
        nestingPrefix: '$t(',
        nestingSuffix: ')',
        nestingOptionsSeparator: ',',
        maxReplaces: 1000,
        skipOnVariables: false
      }
    };
  }
  function transformOptions(options) {
    if (typeof options.ns === 'string') options.ns = [options.ns];
    if (typeof options.fallbackLng === 'string') options.fallbackLng = [options.fallbackLng];
    if (typeof options.fallbackNS === 'string') options.fallbackNS = [options.fallbackNS];

    if (options.whitelist) {
      if (options.whitelist && options.whitelist.indexOf('cimode') < 0) {
        options.whitelist = options.whitelist.concat(['cimode']);
      }

      options.supportedLngs = options.whitelist;
    }

    if (options.nonExplicitWhitelist) {
      options.nonExplicitSupportedLngs = options.nonExplicitWhitelist;
    }

    if (options.supportedLngs && options.supportedLngs.indexOf('cimode') < 0) {
      options.supportedLngs = options.supportedLngs.concat(['cimode']);
    }

    return options;
  }

  function noop() {}

  var I18n = function (_EventEmitter) {
    _inherits(I18n, _EventEmitter);

    function I18n() {
      var _this;

      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      var callback = arguments.length > 1 ? arguments[1] : undefined;

      _classCallCheck(this, I18n);

      _this = _possibleConstructorReturn(this, _getPrototypeOf(I18n).call(this));

      if (isIE10) {
        EventEmitter.call(_assertThisInitialized(_this));
      }

      _this.options = transformOptions(options);
      _this.services = {};
      _this.logger = baseLogger;
      _this.modules = {
        external: []
      };

      if (callback && !_this.isInitialized && !options.isClone) {
        if (!_this.options.initImmediate) {
          _this.init(options, callback);

          return _possibleConstructorReturn(_this, _assertThisInitialized(_this));
        }

        setTimeout(function () {
          _this.init(options, callback);
        }, 0);
      }

      return _this;
    }

    _createClass(I18n, [{
      key: "init",
      value: function init() {
        var _this2 = this;

        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        var callback = arguments.length > 1 ? arguments[1] : undefined;

        if (typeof options === 'function') {
          callback = options;
          options = {};
        }

        if (options.whitelist && !options.supportedLngs) {
          this.logger.deprecate('whitelist', 'option "whitelist" will be renamed to "supportedLngs" in the next major - please make sure to rename this option asap.');
        }

        if (options.nonExplicitWhitelist && !options.nonExplicitSupportedLngs) {
          this.logger.deprecate('whitelist', 'options "nonExplicitWhitelist" will be renamed to "nonExplicitSupportedLngs" in the next major - please make sure to rename this option asap.');
        }

        this.options = _objectSpread({}, get(), this.options, transformOptions(options));
        this.format = this.options.interpolation.format;
        if (!callback) callback = noop;

        function createClassOnDemand(ClassOrObject) {
          if (!ClassOrObject) return null;
          if (typeof ClassOrObject === 'function') return new ClassOrObject();
          return ClassOrObject;
        }

        if (!this.options.isClone) {
          if (this.modules.logger) {
            baseLogger.init(createClassOnDemand(this.modules.logger), this.options);
          } else {
            baseLogger.init(null, this.options);
          }

          var lu = new LanguageUtil(this.options);
          this.store = new ResourceStore(this.options.resources, this.options);
          var s = this.services;
          s.logger = baseLogger;
          s.resourceStore = this.store;
          s.languageUtils = lu;
          s.pluralResolver = new PluralResolver(lu, {
            prepend: this.options.pluralSeparator,
            compatibilityJSON: this.options.compatibilityJSON,
            simplifyPluralSuffix: this.options.simplifyPluralSuffix
          });
          s.interpolator = new Interpolator(this.options);
          s.utils = {
            hasLoadedNamespace: this.hasLoadedNamespace.bind(this)
          };
          s.backendConnector = new Connector(createClassOnDemand(this.modules.backend), s.resourceStore, s, this.options);
          s.backendConnector.on('*', function (event) {
            for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
              args[_key - 1] = arguments[_key];
            }

            _this2.emit.apply(_this2, [event].concat(args));
          });

          if (this.modules.languageDetector) {
            s.languageDetector = createClassOnDemand(this.modules.languageDetector);
            s.languageDetector.init(s, this.options.detection, this.options);
          }

          if (this.modules.i18nFormat) {
            s.i18nFormat = createClassOnDemand(this.modules.i18nFormat);
            if (s.i18nFormat.init) s.i18nFormat.init(this);
          }

          this.translator = new Translator(this.services, this.options);
          this.translator.on('*', function (event) {
            for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
              args[_key2 - 1] = arguments[_key2];
            }

            _this2.emit.apply(_this2, [event].concat(args));
          });
          this.modules.external.forEach(function (m) {
            if (m.init) m.init(_this2);
          });
        }

        if (this.options.fallbackLng && !this.services.languageDetector && !this.options.lng) {
          var codes = this.services.languageUtils.getFallbackCodes(this.options.fallbackLng);
          if (codes.length > 0 && codes[0] !== 'dev') this.options.lng = codes[0];
        }

        if (!this.services.languageDetector && !this.options.lng) {
          this.logger.warn('init: no languageDetector is used and no lng is defined');
        }

        var storeApi = ['getResource', 'hasResourceBundle', 'getResourceBundle', 'getDataByLanguage'];
        storeApi.forEach(function (fcName) {
          _this2[fcName] = function () {
            var _this2$store;

            return (_this2$store = _this2.store)[fcName].apply(_this2$store, arguments);
          };
        });
        var storeApiChained = ['addResource', 'addResources', 'addResourceBundle', 'removeResourceBundle'];
        storeApiChained.forEach(function (fcName) {
          _this2[fcName] = function () {
            var _this2$store2;

            (_this2$store2 = _this2.store)[fcName].apply(_this2$store2, arguments);

            return _this2;
          };
        });
        var deferred = defer();

        var load = function load() {
          var finish = function finish(err, t) {
            if (_this2.isInitialized) _this2.logger.warn('init: i18next is already initialized. You should call init just once!');
            _this2.isInitialized = true;
            if (!_this2.options.isClone) _this2.logger.log('initialized', _this2.options);

            _this2.emit('initialized', _this2.options);

            deferred.resolve(t);
            callback(err, t);
          };

          if (_this2.languages && _this2.options.compatibilityAPI !== 'v1' && !_this2.isInitialized) return finish(null, _this2.t.bind(_this2));

          _this2.changeLanguage(_this2.options.lng, finish);
        };

        if (this.options.resources || !this.options.initImmediate) {
          load();
        } else {
          setTimeout(load, 0);
        }

        return deferred;
      }
    }, {
      key: "loadResources",
      value: function loadResources(language) {
        var _this3 = this;

        var callback = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : noop;
        var usedCallback = callback;
        var usedLng = typeof language === 'string' ? language : this.language;
        if (typeof language === 'function') usedCallback = language;

        if (!this.options.resources || this.options.partialBundledLanguages) {
          if (usedLng && usedLng.toLowerCase() === 'cimode') return usedCallback();
          var toLoad = [];

          var append = function append(lng) {
            if (!lng) return;

            var lngs = _this3.services.languageUtils.toResolveHierarchy(lng);

            lngs.forEach(function (l) {
              if (toLoad.indexOf(l) < 0) toLoad.push(l);
            });
          };

          if (!usedLng) {
            var fallbacks = this.services.languageUtils.getFallbackCodes(this.options.fallbackLng);
            fallbacks.forEach(function (l) {
              return append(l);
            });
          } else {
            append(usedLng);
          }

          if (this.options.preload) {
            this.options.preload.forEach(function (l) {
              return append(l);
            });
          }

          this.services.backendConnector.load(toLoad, this.options.ns, usedCallback);
        } else {
          usedCallback(null);
        }
      }
    }, {
      key: "reloadResources",
      value: function reloadResources(lngs, ns, callback) {
        var deferred = defer();
        if (!lngs) lngs = this.languages;
        if (!ns) ns = this.options.ns;
        if (!callback) callback = noop;
        this.services.backendConnector.reload(lngs, ns, function (err) {
          deferred.resolve();
          callback(err);
        });
        return deferred;
      }
    }, {
      key: "use",
      value: function use(module) {
        if (!module) throw new Error('You are passing an undefined module! Please check the object you are passing to i18next.use()');
        if (!module.type) throw new Error('You are passing a wrong module! Please check the object you are passing to i18next.use()');

        if (module.type === 'backend') {
          this.modules.backend = module;
        }

        if (module.type === 'logger' || module.log && module.warn && module.error) {
          this.modules.logger = module;
        }

        if (module.type === 'languageDetector') {
          this.modules.languageDetector = module;
        }

        if (module.type === 'i18nFormat') {
          this.modules.i18nFormat = module;
        }

        if (module.type === 'postProcessor') {
          postProcessor.addPostProcessor(module);
        }

        if (module.type === '3rdParty') {
          this.modules.external.push(module);
        }

        return this;
      }
    }, {
      key: "changeLanguage",
      value: function changeLanguage(lng, callback) {
        var _this4 = this;

        this.isLanguageChangingTo = lng;
        var deferred = defer();
        this.emit('languageChanging', lng);

        var done = function done(err, l) {
          if (l) {
            _this4.language = l;
            _this4.languages = _this4.services.languageUtils.toResolveHierarchy(l);

            _this4.translator.changeLanguage(l);

            _this4.isLanguageChangingTo = undefined;

            _this4.emit('languageChanged', l);

            _this4.logger.log('languageChanged', l);
          } else {
            _this4.isLanguageChangingTo = undefined;
          }

          deferred.resolve(function () {
            return _this4.t.apply(_this4, arguments);
          });
          if (callback) callback(err, function () {
            return _this4.t.apply(_this4, arguments);
          });
        };

        var setLng = function setLng(lngs) {
          if (!lng && !lngs && _this4.services.languageDetector) lngs = [];
          var l = typeof lngs === 'string' ? lngs : _this4.services.languageUtils.getBestMatchFromCodes(lngs);

          if (l) {
            if (!_this4.language) {
              _this4.language = l;
              _this4.languages = _this4.services.languageUtils.toResolveHierarchy(l);
            }

            if (!_this4.translator.language) _this4.translator.changeLanguage(l);
            if (_this4.services.languageDetector) _this4.services.languageDetector.cacheUserLanguage(l);
          }

          _this4.loadResources(l, function (err) {
            done(err, l);
          });
        };

        if (!lng && this.services.languageDetector && !this.services.languageDetector.async) {
          setLng(this.services.languageDetector.detect());
        } else if (!lng && this.services.languageDetector && this.services.languageDetector.async) {
          this.services.languageDetector.detect(setLng);
        } else {
          setLng(lng);
        }

        return deferred;
      }
    }, {
      key: "getFixedT",
      value: function getFixedT(lng, ns) {
        var _this5 = this;

        var fixedT = function fixedT(key, opts) {
          var options;

          if (_typeof(opts) !== 'object') {
            for (var _len3 = arguments.length, rest = new Array(_len3 > 2 ? _len3 - 2 : 0), _key3 = 2; _key3 < _len3; _key3++) {
              rest[_key3 - 2] = arguments[_key3];
            }

            options = _this5.options.overloadTranslationOptionHandler([key, opts].concat(rest));
          } else {
            options = _objectSpread({}, opts);
          }

          options.lng = options.lng || fixedT.lng;
          options.lngs = options.lngs || fixedT.lngs;
          options.ns = options.ns || fixedT.ns;
          return _this5.t(key, options);
        };

        if (typeof lng === 'string') {
          fixedT.lng = lng;
        } else {
          fixedT.lngs = lng;
        }

        fixedT.ns = ns;
        return fixedT;
      }
    }, {
      key: "t",
      value: function t() {
        var _this$translator;

        return this.translator && (_this$translator = this.translator).translate.apply(_this$translator, arguments);
      }
    }, {
      key: "exists",
      value: function exists() {
        var _this$translator2;

        return this.translator && (_this$translator2 = this.translator).exists.apply(_this$translator2, arguments);
      }
    }, {
      key: "setDefaultNamespace",
      value: function setDefaultNamespace(ns) {
        this.options.defaultNS = ns;
      }
    }, {
      key: "hasLoadedNamespace",
      value: function hasLoadedNamespace(ns) {
        var _this6 = this;

        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

        if (!this.isInitialized) {
          this.logger.warn('hasLoadedNamespace: i18next was not initialized', this.languages);
          return false;
        }

        if (!this.languages || !this.languages.length) {
          this.logger.warn('hasLoadedNamespace: i18n.languages were undefined or empty', this.languages);
          return false;
        }

        var lng = this.languages[0];
        var fallbackLng = this.options ? this.options.fallbackLng : false;
        var lastLng = this.languages[this.languages.length - 1];
        if (lng.toLowerCase() === 'cimode') return true;

        var loadNotPending = function loadNotPending(l, n) {
          var loadState = _this6.services.backendConnector.state["".concat(l, "|").concat(n)];

          return loadState === -1 || loadState === 2;
        };

        if (options.precheck) {
          var preResult = options.precheck(this, loadNotPending);
          if (preResult !== undefined) return preResult;
        }

        if (this.hasResourceBundle(lng, ns)) return true;
        if (!this.services.backendConnector.backend) return true;
        if (loadNotPending(lng, ns) && (!fallbackLng || loadNotPending(lastLng, ns))) return true;
        return false;
      }
    }, {
      key: "loadNamespaces",
      value: function loadNamespaces(ns, callback) {
        var _this7 = this;

        var deferred = defer();

        if (!this.options.ns) {
          callback && callback();
          return Promise.resolve();
        }

        if (typeof ns === 'string') ns = [ns];
        ns.forEach(function (n) {
          if (_this7.options.ns.indexOf(n) < 0) _this7.options.ns.push(n);
        });
        this.loadResources(function (err) {
          deferred.resolve();
          if (callback) callback(err);
        });
        return deferred;
      }
    }, {
      key: "loadLanguages",
      value: function loadLanguages(lngs, callback) {
        var deferred = defer();
        if (typeof lngs === 'string') lngs = [lngs];
        var preloaded = this.options.preload || [];
        var newLngs = lngs.filter(function (lng) {
          return preloaded.indexOf(lng) < 0;
        });

        if (!newLngs.length) {
          if (callback) callback();
          return Promise.resolve();
        }

        this.options.preload = preloaded.concat(newLngs);
        this.loadResources(function (err) {
          deferred.resolve();
          if (callback) callback(err);
        });
        return deferred;
      }
    }, {
      key: "dir",
      value: function dir(lng) {
        if (!lng) lng = this.languages && this.languages.length > 0 ? this.languages[0] : this.language;
        if (!lng) return 'rtl';
        var rtlLngs = ['ar', 'shu', 'sqr', 'ssh', 'xaa', 'yhd', 'yud', 'aao', 'abh', 'abv', 'acm', 'acq', 'acw', 'acx', 'acy', 'adf', 'ads', 'aeb', 'aec', 'afb', 'ajp', 'apc', 'apd', 'arb', 'arq', 'ars', 'ary', 'arz', 'auz', 'avl', 'ayh', 'ayl', 'ayn', 'ayp', 'bbz', 'pga', 'he', 'iw', 'ps', 'pbt', 'pbu', 'pst', 'prp', 'prd', 'ug', 'ur', 'ydd', 'yds', 'yih', 'ji', 'yi', 'hbo', 'men', 'xmn', 'fa', 'jpr', 'peo', 'pes', 'prs', 'dv', 'sam'];
        return rtlLngs.indexOf(this.services.languageUtils.getLanguagePartFromCode(lng)) >= 0 ? 'rtl' : 'ltr';
      }
    }, {
      key: "createInstance",
      value: function createInstance() {
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        var callback = arguments.length > 1 ? arguments[1] : undefined;
        return new I18n(options, callback);
      }
    }, {
      key: "cloneInstance",
      value: function cloneInstance() {
        var _this8 = this;

        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        var callback = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : noop;

        var mergedOptions = _objectSpread({}, this.options, options, {
          isClone: true
        });

        var clone = new I18n(mergedOptions);
        var membersToCopy = ['store', 'services', 'language'];
        membersToCopy.forEach(function (m) {
          clone[m] = _this8[m];
        });
        clone.services = _objectSpread({}, this.services);
        clone.services.utils = {
          hasLoadedNamespace: clone.hasLoadedNamespace.bind(clone)
        };
        clone.translator = new Translator(clone.services, clone.options);
        clone.translator.on('*', function (event) {
          for (var _len4 = arguments.length, args = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
            args[_key4 - 1] = arguments[_key4];
          }

          clone.emit.apply(clone, [event].concat(args));
        });
        clone.init(mergedOptions, callback);
        clone.translator.options = clone.options;
        clone.translator.backendConnector.services.utils = {
          hasLoadedNamespace: clone.hasLoadedNamespace.bind(clone)
        };
        return clone;
      }
    }, {
      key: "toJSON",
      value: function toJSON() {
        return {
          options: this.options,
          store: this.store,
          language: this.language,
          languages: this.languages
        };
      }
    }]);

    return I18n;
  }(EventEmitter);

  var i18next = new I18n();

  return i18next;

})));