code: function(options) {
      var pattern = orthographyMatchers[options.language];
      if (!pattern) {
          WordTokenizer.call(this, options);
      } else {
          this._pattern = pattern;
          RegexpTokenizer.call(this, options);
      }
  }
docs: *
  A tokenizer that accepts an alphabet definition.
  @param {string} options.language ISO 639-1 for the language, e.g. 'en'