code: function Lexicon(language, defaultCategory, defaultCategoryCapitalised) {
    switch (language) {
      case 'EN':
        this.lexicon = englishLexicon;
        break;
      case 'DU':
        this.lexicon = dutchLexicon;
        break;
      default:
        this.lexicon = dutchLexicon;
        break;
    }
    if (defaultCategory) {
      this.defaultCategory = defaultCategory;
      if (defaultCategoryCapitalised) {
        this.defaultCategoryCapitalised = defaultCategoryCapitalised;
      }
    }
  }
docs: Constructor creates a Lexicon for language