Two letter language codes.

language_codes.js

// from http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
(function () {
  if (typeof LANGUAGE_CODES === 'undefined') {
    window.LANGUAGE_CODES = [
      {code:'aa', name:'Afar'},
      {code:'ab', name:'Abkhazian'},
      {code:'ae', name:'Avestan'},
      {code:'af', name:'Afrikaans'},
      {code:'ak', name:'Akan'},
      {code:'am', name:'Amharic'},
      {code:'an', name:'Aragonese'},
      {code:'ar', name:'Arabic'},
      {code:'as', name:'Assamese'},
      {code:'av', name:'Avaric'},
      {code:'ay', name:'Aymara'},
      {code:'az', name:'Azerbaijani'},
      {code:'ba', name:'Bashkir'},
      {code:'be', name:'Belarusian'},
      {code:'bg', name:'Bulgarian'},
      {code:'bh', name:'Bihari'},
      {code:'bi', name:'Bislama'},
      {code:'bm', name:'Bambara'},
      {code:'bn', name:'Bengali'},
      {code:'bo', name:'Tibetan'},
      {code:'br', name:'Breton'},
      {code:'bs', name:'Bosnian'},
      {code:'ca', name:'Catalan, Valencian'},
      {code:'ce', name:'Chechen'},
      {code:'ch', name:'Chamorro'},
      {code:'co', name:'Corsican'},
      {code:'cr', name:'Cree'},
      {code:'cs', name:'Czech'},
      {code:'cu', name:'Church Slavic, Old Slavonic, Church Slavonic, Old Bulgarian, Old Church Slavonic'},
      {code:'cv', name:'Chuvash'},
      {code:'cy', name:'Welsh'},
      {code:'da', name:'Danish'},
      {code:'de', name:'German'},
      {code:'dv', name:'Divehi, Dhivehi, Maldivian'},
      {code:'dz', name:'Dzongkha'},
      {code:'ee', name:'Ewe'},
      {code:'el', name:'Modern Greek'},
      {code:'en', name:'English'},
      {code:'eo', name:'Esperanto'},
      {code:'es', name:'Spanish, Castilian'},
      {code:'et', name:'Estonian'},
      {code:'eu', name:'Basque'},
      {code:'fa', name:'Persian'},
      {code:'ff', name:'Fulah'},
      {code:'fi', name:'Finnish'},
      {code:'fj', name:'Fijian'},
      {code:'fo', name:'Faroese'},
      {code:'fr', name:'French'},
      {code:'fy', name:'Western Frisian'},
      {code:'ga', name:'Irish'},
      {code:'gd', name:'Gaelic, Scottish Gaelic'},
      {code:'gl', name:'Galician'},
      {code:'gn', name:'Guaraní'},
      {code:'gu', name:'Gujarati'},
      {code:'gv', name:'Manx'},
      {code:'ha', name:'Hausa'},
      {code:'he', name:'Modern Hebrew'},
      {code:'hi', name:'Hindi'},
      {code:'ho', name:'Hiri Motu'},
      {code:'hr', name:'Croatian'},
      {code:'ht', name:'Haitian, Haitian Creole'},
      {code:'hu', name:'Hungarian'},
      {code:'hy', name:'Armenian'},
      {code:'hz', name:'Herero'},
      {code:'ia', name:'Interlingua (International Auxiliary Language Association)'},
      {code:'id', name:'Indonesian'},
      {code:'ie', name:'Interlingue, Occidental'},
      {code:'ig', name:'Igbo'},
      {code:'ii', name:'Sichuan Yi, Nuosu'},
      {code:'ik', name:'Inupiaq'},
      {code:'io', name:'Ido'},
      {code:'is', name:'Icelandic'},
      {code:'it', name:'Italian'},
      {code:'iu', name:'Inuktitut'},
      {code:'ja', name:'Japanese'},
      {code:'jv', name:'Javanese'},
      {code:'ka', name:'Georgian'},
      {code:'kg', name:'Kongo'},
      {code:'ki', name:'Kikuyu, Gikuyu'},
      {code:'kj', name:'Kwanyama, Kuanyama'},
      {code:'kk', name:'Kazakh'},
      {code:'kl', name:'Kalaallisut, Greenlandic'},
      {code:'km', name:'Central Khmer'},
      {code:'kn', name:'Kannada'},
      {code:'ko', name:'Korean'},
      {code:'kr', name:'Kanuri'},
      {code:'ks', name:'Kashmiri'},
      {code:'ku', name:'Kurdish'},
      {code:'kv', name:'Komi'},
      {code:'kw', name:'Cornish'},
      {code:'ky', name:'Kirghiz, Kyrgyz'},
      {code:'la', name:'Latin'},
      {code:'lb', name:'Luxembourgish, Letzeburgesch'},
      {code:'lg', name:'Ganda'},
      {code:'li', name:'Limburgish, Limburgan, Limburger'},
      {code:'ln', name:'Lingala'},
      {code:'lo', name:'Lao'},
      {code:'lt', name:'Lithuanian'},
      {code:'lu', name:'Luba-Katanga'},
      {code:'lv', name:'Latvian'},
      {code:'mg', name:'Malagasy'},
      {code:'mh', name:'Marshallese'},
      {code:'mi', name:'Māori'},
      {code:'mk', name:'Macedonian'},
      {code:'ml', name:'Malayalam'},
      {code:'mn', name:'Mongolian'},
      {code:'mr', name:'Marathi'},
      {code:'ms', name:'Malay'},
      {code:'mt', name:'Maltese'},
      {code:'my', name:'Burmese'},
      {code:'na', name:'Nauru'},
      {code:'nb', name:'Norwegian Bokmål'},
      {code:'nd', name:'North Ndebele'},
      {code:'ne', name:'Nepali'},
      {code:'ng', name:'Ndonga'},
      {code:'nl', name:'Dutch, Flemish'},
      {code:'nn', name:'Norwegian Nynorsk'},
      {code:'no', name:'Norwegian'},
      {code:'nr', name:'South Ndebele'},
      {code:'nv', name:'Navajo, Navaho'},
      {code:'ny', name:'Chichewa, Chewa, Nyanja'},
      {code:'oc', name:'Occitan (after 1500)'},
      {code:'oj', name:'Ojibwa'},
      {code:'om', name:'Oromo'},
      {code:'or', name:'Oriya'},
      {code:'os', name:'Ossetian, Ossetic'},
      {code:'pa', name:'Panjabi, Punjabi'},
      {code:'pi', name:'Pāli'},
      {code:'pl', name:'Polish'},
      {code:'ps', name:'Pashto, Pushto'},
      {code:'pt', name:'Portuguese'},
      {code:'qu', name:'Quechua'},
      {code:'rm', name:'Romansh'},
      {code:'rn', name:'Rundi'},
      {code:'ro', name:'Romanian, Moldavian, Moldovan'},
      {code:'ru', name:'Russian'},
      {code:'rw', name:'Kinyarwanda'},
      {code:'sa', name:'Sanskrit'},
      {code:'sc', name:'Sardinian'},
      {code:'sd', name:'Sindhi'},
      {code:'se', name:'Northern Sami'},
      {code:'sg', name:'Sango'},
      {code:'si', name:'Sinhala, Sinhalese'},
      {code:'sk', name:'Slovak'},
      {code:'sl', name:'Slovene'},
      {code:'sm', name:'Samoan'},
      {code:'sn', name:'Shona'},
      {code:'so', name:'Somali'},
      {code:'sq', name:'Albanian'},
      {code:'sr', name:'Serbian'},
      {code:'ss', name:'Swati'},
      {code:'st', name:'Southern Sotho'},
      {code:'su', name:'Sundanese'},
      {code:'sv', name:'Swedish'},
      {code:'sw', name:'Swahili'},
      {code:'ta', name:'Tamil'},
      {code:'te', name:'Telugu'},
      {code:'tg', name:'Tajik'},
      {code:'th', name:'Thai'},
      {code:'ti', name:'Tigrinya'},
      {code:'tk', name:'Turkmen'},
      {code:'tl', name:'Tagalog'},
      {code:'tn', name:'Tswana'},
      {code:'to', name:'Tonga (Tonga Islands)'},
      {code:'tr', name:'Turkish'},
      {code:'ts', name:'Tsonga'},
      {code:'tt', name:'Tatar'},
      {code:'tw', name:'Twi'},
      {code:'ty', name:'Tahitian'},
      {code:'ug', name:'Uighur, Uyghur'},
      {code:'uk', name:'Ukrainian'},
      {code:'ur', name:'Urdu'},
      {code:'uz', name:'Uzbek'},
      {code:'ve', name:'Venda'},
      {code:'vi', name:'Vietnamese'},
      {code:'vo', name:'Volapük'},
      {code:'wa', name:'Walloon'},
      {code:'wo', name:'Wolof'},
      {code:'xh', name:'Xhosa'},
      {code:'yi', name:'Yiddish'},
      {code:'yo', name:'Yoruba'},
      {code:'za', name:'Zhuang, Chuang'},
      {code:'zh', name:'Chinese'},
      {code:'zu', name:'Zulu'}
    ];
  };
})();