List of Language Codes in YAML or JSON? [closed]

Answer 1

I think the United Nations or the ISO actually publish that list in CSV format. That would be the ultimate source.

However, I'm not sure if they publish it for free.

EDIT: Actually, the link is in the Wikipedia article you linked to. The US Library of Congress has been designated the official registration authority by the ISO and they publish the entire, official, up-to-date list as a trivial to parse text file for free.

The format looks like this:

ara||ar|Arabic|arabe
arc|||Official Aramaic (700-300 BCE); Imperial Aramaic (700-300 BCE)|araméen d'empire (700-300 BCE)
arg||an|Aragonese|aragonais
arm|hye|hy|Armenian|arménien
arn|||Mapudungun; Mapuche|mapudungun; mapuche; mapuce
arp|||Arapaho|arapaho
art|||Artificial languages|artificielles, langues
arw|||Arawak|arawak
asm||as|Assamese|assamais
ast|||Asturian; Bable; Leonese; Asturleonese|asturien; bable; léonais; asturoléonais
ath|||Athapascan languages|athapascanes, langues

That's 5 fields separated by vertical bars:

1. ISO 639-2 Alpha-3 bibliographic code
2. ISO 639-2 Alpha-3 terminology code
3. ISO 639-1 Alpha-2 code
4. English language name(s)
5. French language name(s)

So, this is actually in CSV format, if you interpret that as character separated values instead of comma separated values, which most CSV parsers let you do.

Answer 2

You can also try this JSON written as a list of objects:

[
  {
    "code": "ab",
    "name": "Abkhaz"
  },
  {
    "code": "aa",
    "name": "Afar"
  },
  {
    "code": "af",
    "name": "Afrikaans"
  },
  {
    "code": "ak",
    "name": "Akan"
  },
  {
    "code": "sq",
    "name": "Albanian"
  },
  {
    "code": "am",
    "name": "Amharic"
  },
  {
    "code": "ar",
    "name": "Arabic"
  },
  {
    "code": "an",
    "name": "Aragonese"
  },
  {
    "code": "hy",
    "name": "Armenian"
  },
  {
    "code": "as",
    "name": "Assamese"
  },
  {
    "code": "av",
    "name": "Avaric"
  },
  {
    "code": "ae",
    "name": "Avestan"
  },
  {
    "code": "ay",
    "name": "Aymara"
  },
  {
    "code": "az",
    "name": "Azerbaijani"
  },
  {
    "code": "bm",
    "name": "Bambara"
  },
  {
    "code": "ba",
    "name": "Bashkir"
  },
  {
    "code": "eu",
    "name": "Basque"
  },
  {
    "code": "be",
    "name": "Belarusian"
  },
  {
    "code": "bn",
    "name": "Bengali; Bangla"
  },
  {
    "code": "bh",
    "name": "Bihari"
  },
  {
    "code": "bi",
    "name": "Bislama"
  },
  {
    "code": "bs",
    "name": "Bosnian"
  },
  {
    "code": "br",
    "name": "Breton"
  },
  {
    "code": "bg",
    "name": "Bulgarian"
  },
  {
    "code": "my",
    "name": "Burmese"
  },
  {
    "code": "ca",
    "name": "Catalan; Valencian"
  },
  {
    "code": "ch",
    "name": "Chamorro"
  },
  {
    "code": "ce",
    "name": "Chechen"
  },
  {
    "code": "ny",
    "name": "Chichewa; Chewa; Nyanja"
  },
  {
    "code": "zh",
    "name": "Chinese"
  },
  {
    "code": "cv",
    "name": "Chuvash"
  },
  {
    "code": "kw",
    "name": "Cornish"
  },
  {
    "code": "co",
    "name": "Corsican"
  },
  {
    "code": "cr",
    "name": "Cree"
  },
  {
    "code": "hr",
    "name": "Croatian"
  },
  {
    "code": "cs",
    "name": "Czech"
  },
  {
    "code": "da",
    "name": "Danish"
  },
  {
    "code": "dv",
    "name": "Divehi; Dhivehi; Maldivian;"
  },
  {
    "code": "nl",
    "name": "Dutch"
  },
  {
    "code": "dz",
    "name": "Dzongkha"
  },
  {
    "code": "en",
    "name": "English"
  },
  {
    "code": "eo",
    "name": "Esperanto"
  },
  {
    "code": "et",
    "name": "Estonian"
  },
  {
    "code": "ee",
    "name": "Ewe"
  },
  {
    "code": "fo",
    "name": "Faroese"
  },
  {
    "code": "fj",
    "name": "Fijian"
  },
  {
    "code": "fi",
    "name": "Finnish"
  },
  {
    "code": "fr",
    "name": "French"
  },
  {
    "code": "ff",
    "name": "Fula; Fulah; Pulaar; Pular"
  },
  {
    "code": "gl",
    "name": "Galician"
  },
  {
    "code": "ka",
    "name": "Georgian"
  },
  {
    "code": "de",
    "name": "German"
  },
  {
    "code": "el",
    "name": "Greek, Modern"
  },
  {
    "code": "gn",
    "name": "Guaraní"
  },
  {
    "code": "gu",
    "name": "Gujarati"
  },
  {
    "code": "ht",
    "name": "Haitian; Haitian Creole"
  },
  {
    "code": "ha",
    "name": "Hausa"
  },
  {
    "code": "he",
    "name": "Hebrew (modern)"
  },
  {
    "code": "hz",
    "name": "Herero"
  },
  {
    "code": "hi",
    "name": "Hindi"
  },
  {
    "code": "ho",
    "name": "Hiri Motu"
  },
  {
    "code": "hu",
    "name": "Hungarian"
  },
  {
    "code": "ia",
    "name": "Interlingua"
  },
  {
    "code": "id",
    "name": "Indonesian"
  },
  {
    "code": "ie",
    "name": "Interlingue"
  },
  {
    "code": "ga",
    "name": "Irish"
  },
  {
    "code": "ig",
    "name": "Igbo"
  },
  {
    "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": "kl",
    "name": "Kalaallisut, Greenlandic"
  },
  {
    "code": "kn",
    "name": "Kannada"
  },
  {
    "code": "kr",
    "name": "Kanuri"
  },
  {
    "code": "ks",
    "name": "Kashmiri"
  },
  {
    "code": "kk",
    "name": "Kazakh"
  },
  {
    "code": "km",
    "name": "Khmer"
  },
  {
    "code": "ki",
    "name": "Kikuyu, Gikuyu"
  },
  {
    "code": "rw",
    "name": "Kinyarwanda"
  },
  {
    "code": "ky",
    "name": "Kyrgyz"
  },
  {
    "code": "kv",
    "name": "Komi"
  },
  {
    "code": "kg",
    "name": "Kongo"
  },
  {
    "code": "ko",
    "name": "Korean"
  },
  {
    "code": "ku",
    "name": "Kurdish"
  },
  {
    "code": "kj",
    "name": "Kwanyama, Kuanyama"
  },
  {
    "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": "gv",
    "name": "Manx"
  },
  {
    "code": "mk",
    "name": "Macedonian"
  },
  {
    "code": "mg",
    "name": "Malagasy"
  },
  {
    "code": "ms",
    "name": "Malay"
  },
  {
    "code": "ml",
    "name": "Malayalam"
  },
  {
    "code": "mt",
    "name": "Maltese"
  },
  {
    "code": "mi",
    "name": "MÄori"
  },
  {
    "code": "mr",
    "name": "Marathi (MarÄá¹­hÄ«)"
  },
  {
    "code": "mh",
    "name": "Marshallese"
  },
  {
    "code": "mn",
    "name": "Mongolian"
  },
  {
    "code": "na",
    "name": "Nauru"
  },
  {
    "code": "nv",
    "name": "Navajo, Navaho"
  },
  {
    "code": "nb",
    "name": "Norwegian Bokmål"
  },
  {
    "code": "nd",
    "name": "North Ndebele"
  },
  {
    "code": "ne",
    "name": "Nepali"
  },
  {
    "code": "ng",
    "name": "Ndonga"
  },
  {
    "code": "nn",
    "name": "Norwegian Nynorsk"
  },
  {
    "code": "no",
    "name": "Norwegian"
  },
  {
    "code": "ii",
    "name": "Nuosu"
  },
  {
    "code": "nr",
    "name": "South Ndebele"
  },
  {
    "code": "oc",
    "name": "Occitan"
  },
  {
    "code": "oj",
    "name": "Ojibwe, Ojibwa"
  },
  {
    "code": "cu",
    "name": "Old Church Slavonic, Church Slavic, Church Slavonic, Old Bulgarian, Old Slavonic"
  },
  {
    "code": "om",
    "name": "Oromo"
  },
  {
    "code": "or",
    "name": "Oriya"
  },
  {
    "code": "os",
    "name": "Ossetian, Ossetic"
  },
  {
    "code": "pa",
    "name": "Panjabi, Punjabi"
  },
  {
    "code": "pi",
    "name": "PÄli"
  },
  {
    "code": "fa",
    "name": "Persian (Farsi)"
  },
  {
    "code": "pl",
    "name": "Polish"
  },
  {
    "code": "ps",
    "name": "Pashto, Pushto"
  },
  {
    "code": "pt",
    "name": "Portuguese"
  },
  {
    "code": "qu",
    "name": "Quechua"
  },
  {
    "code": "rm",
    "name": "Romansh"
  },
  {
    "code": "rn",
    "name": "Kirundi"
  },
  {
    "code": "ro",
    "name": "Romanian, [])"
  },
  {
    "code": "ru",
    "name": "Russian"
  },
  {
    "code": "sa",
    "name": "Sanskrit (Saá¹ská¹›ta)"
  },
  {
    "code": "sc",
    "name": "Sardinian"
  },
  {
    "code": "sd",
    "name": "Sindhi"
  },
  {
    "code": "se",
    "name": "Northern Sami"
  },
  {
    "code": "sm",
    "name": "Samoan"
  },
  {
    "code": "sg",
    "name": "Sango"
  },
  {
    "code": "sr",
    "name": "Serbian"
  },
  {
    "code": "gd",
    "name": "Scottish Gaelic; Gaelic"
  },
  {
    "code": "sn",
    "name": "Shona"
  },
  {
    "code": "si",
    "name": "Sinhala, Sinhalese"
  },
  {
    "code": "sk",
    "name": "Slovak"
  },
  {
    "code": "sl",
    "name": "Slovene"
  },
  {
    "code": "so",
    "name": "Somali"
  },
  {
    "code": "st",
    "name": "Southern Sotho"
  },
  {
    "code": "es",
    "name": "Spanish; Castilian"
  },
  {
    "code": "su",
    "name": "Sundanese"
  },
  {
    "code": "sw",
    "name": "Swahili"
  },
  {
    "code": "ss",
    "name": "Swati"
  },
  {
    "code": "sv",
    "name": "Swedish"
  },
  {
    "code": "ta",
    "name": "Tamil"
  },
  {
    "code": "te",
    "name": "Telugu"
  },
  {
    "code": "tg",
    "name": "Tajik"
  },
  {
    "code": "th",
    "name": "Thai"
  },
  {
    "code": "ti",
    "name": "Tigrinya"
  },
  {
    "code": "bo",
    "name": "Tibetan Standard, Tibetan, Central"
  },
  {
    "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": "Uyghur, Uighur"
  },
  {
    "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": "cy",
    "name": "Welsh"
  },
  {
    "code": "wo",
    "name": "Wolof"
  },
  {
    "code": "fy",
    "name": "Western Frisian"
  },
  {
    "code": "xh",
    "name": "Xhosa"
  },
  {
    "code": "yi",
    "name": "Yiddish"
  },
  {
    "code": "yo",
    "name": "Yoruba"
  },
  {
    "code": "za",
    "name": "Zhuang, Chuang"
  },
  {
    "code": "zu",
    "name": "Zulu"
  }
]

Answer 3

This small code can help to build an array, using the 2 letter code "iso639-1" as the 'key' and the language name as the 'value' getting data from: from http://loc.gov/standards/iso639-2/ISO-639-2_utf-8.txt

<?php
$lang = array();
$row = 1;
if (($handle = fopen('http://loc.gov/standards/iso639-2/ISO-639-2_utf-8.txt', 'r')) !== FALSE) {
  while (($data = fgetcsv($handle, 1000, '|')) !== FALSE) {
    $row++;
    if (!empty($data[2])) {
      /* to get only the first language (anything before ;) */
      $lang[$data[2]]  = strtok($data[3], ';'); 
     }
  }
  fclose($handle);
}

?>

Answer 4

julianromera's and instine's answers merged:

 [
      {"code":"ab","name":"Abkhaz","nativeName":"аҧсуа"},
      {"code":"aa","name":"Afar","nativeName":"Afaraf"},
      {"code":"af","name":"Afrikaans","nativeName":"Afrikaans"},
      {"code":"ak","name":"Akan","nativeName":"Akan"},
      {"code":"sq","name":"Albanian","nativeName":"Shqip"},
      {"code":"am","name":"Amharic","nativeName":"አማርኛ"},
      {"code":"ar","name":"Arabic","nativeName":"العربية"},
      {"code":"an","name":"Aragonese","nativeName":"Aragonés"},
      {"code":"hy","name":"Armenian","nativeName":"Հայերեն"},
      {"code":"as","name":"Assamese","nativeName":"অসমীয়া"},
      {"code":"av","name":"Avaric","nativeName":"авар мацӀ, магӀарул мацӀ"},
      {"code":"ae","name":"Avestan","nativeName":"avesta"},
      {"code":"ay","name":"Aymara","nativeName":"aymar aru"},
      {"code":"az","name":"Azerbaijani","nativeName":"azərbaycan dili"},
      {"code":"bm","name":"Bambara","nativeName":"bamanankan"},
      {"code":"ba","name":"Bashkir","nativeName":"башҡорт теле"},
      {"code":"eu","name":"Basque","nativeName":"euskara, euskera"},
      {"code":"be","name":"Belarusian","nativeName":"Беларуская"},
      {"code":"bn","name":"Bengali","nativeName":"বাংলা"},
      {"code":"bh","name":"Bihari","nativeName":"भोजपुरी"},
      {"code":"bi","name":"Bislama","nativeName":"Bislama"},
      {"code":"bs","name":"Bosnian","nativeName":"bosanski jezik"},
      {"code":"br","name":"Breton","nativeName":"brezhoneg"},
      {"code":"bg","name":"Bulgarian","nativeName":"български език"},
      {"code":"my","name":"Burmese","nativeName":"ဗမာစာ"},
      {"code":"ca","name":"Catalan; Valencian","nativeName":"Català"},
      {"code":"ch","name":"Chamorro","nativeName":"Chamoru"},
      {"code":"ce","name":"Chechen","nativeName":"нохчийн мотт"},
      {"code":"ny","name":"Chichewa; Chewa; Nyanja","nativeName":"chiCheŵa, chinyanja"},
      {"code":"zh","name":"Chinese","nativeName":"中文 (Zhōngwén), 汉语, 漢語"},
      {"code":"cv","name":"Chuvash","nativeName":"чӑваш чӗлхи"},
      {"code":"kw","name":"Cornish","nativeName":"Kernewek"},
      {"code":"co","name":"Corsican","nativeName":"corsu, lingua corsa"},
      {"code":"cr","name":"Cree","nativeName":"ᓀᐦᐃᔭᐍᐏᐣ"},
      {"code":"hr","name":"Croatian","nativeName":"hrvatski"},
      {"code":"cs","name":"Czech","nativeName":"česky, čeština"},
      {"code":"da","name":"Danish","nativeName":"dansk"},
      {"code":"dv","name":"Divehi; Dhivehi; Maldivian;","nativeName":"ދިވެހި"},
      {"code":"nl","name":"Dutch","nativeName":"Nederlands, Vlaams"},
      {"code":"en","name":"English","nativeName":"English"},
      {"code":"eo","name":"Esperanto","nativeName":"Esperanto"},
      {"code":"et","name":"Estonian","nativeName":"eesti, eesti keel"},
      {"code":"ee","name":"Ewe","nativeName":"Eʋegbe"},
      {"code":"fo","name":"Faroese","nativeName":"føroyskt"},
      {"code":"fj","name":"Fijian","nativeName":"vosa Vakaviti"},
      {"code":"fi","name":"Finnish","nativeName":"suomi, suomen kieli"},
      {"code":"fr","name":"French","nativeName":"français, langue française"},
      {"code":"ff","name":"Fula; Fulah; Pulaar; Pular","nativeName":"Fulfulde, Pulaar, Pular"},
      {"code":"gl","name":"Galician","nativeName":"Galego"},
      {"code":"ka","name":"Georgian","nativeName":"ქართული"},
      {"code":"de","name":"German","nativeName":"Deutsch"},
      {"code":"el","name":"Greek, Modern","nativeName":"Ελληνικά"},
      {"code":"gn","name":"Guaraní","nativeName":"Avañeẽ"},
      {"code":"gu","name":"Gujarati","nativeName":"ગુજરાતી"},
      {"code":"ht","name":"Haitian; Haitian Creole","nativeName":"Kreyòl ayisyen"},
      {"code":"ha","name":"Hausa","nativeName":"Hausa, هَوُسَ"},
      {"code":"he","name":"Hebrew (modern)","nativeName":"עברית"},
      {"code":"hz","name":"Herero","nativeName":"Otjiherero"},
      {"code":"hi","name":"Hindi","nativeName":"हिन्दी, हिंदी"},
      {"code":"ho","name":"Hiri Motu","nativeName":"Hiri Motu"},
      {"code":"hu","name":"Hungarian","nativeName":"Magyar"},
      {"code":"ia","name":"Interlingua","nativeName":"Interlingua"},
      {"code":"id","name":"Indonesian","nativeName":"Bahasa Indonesia"},
      {"code":"ie","name":"Interlingue","nativeName":"Originally called Occidental; then Interlingue after WWII"},
      {"code":"ga","name":"Irish","nativeName":"Gaeilge"},
      {"code":"ig","name":"Igbo","nativeName":"Asụsụ Igbo"},
      {"code":"ik","name":"Inupiaq","nativeName":"Iñupiaq, Iñupiatun"},
      {"code":"io","name":"Ido","nativeName":"Ido"},
      {"code":"is","name":"Icelandic","nativeName":"Íslenska"},
      {"code":"it","name":"Italian","nativeName":"Italiano"},
      {"code":"iu","name":"Inuktitut","nativeName":"ᐃᓄᒃᑎᑐᑦ"},
      {"code":"ja","name":"Japanese","nativeName":"日本語 (にほんご／にっぽんご)"},
      {"code":"jv","name":"Javanese","nativeName":"basa Jawa"},
      {"code":"kl","name":"Kalaallisut, Greenlandic","nativeName":"kalaallisut, kalaallit oqaasii"},
      {"code":"kn","name":"Kannada","nativeName":"ಕನ್ನಡ"},
      {"code":"kr","name":"Kanuri","nativeName":"Kanuri"},
      {"code":"ks","name":"Kashmiri","nativeName":"कश्मीरी, كشميري‎"},
      {"code":"kk","name":"Kazakh","nativeName":"Қазақ тілі"},
      {"code":"km","name":"Khmer","nativeName":"ភាសាខ្មែរ"},
      {"code":"ki","name":"Kikuyu, Gikuyu","nativeName":"Gĩkũyũ"},
      {"code":"rw","name":"Kinyarwanda","nativeName":"Ikinyarwanda"},
      {"code":"ky","name":"Kirghiz, Kyrgyz","nativeName":"кыргыз тили"},
      {"code":"kv","name":"Komi","nativeName":"коми кыв"},
      {"code":"kg","name":"Kongo","nativeName":"KiKongo"},
      {"code":"ko","name":"Korean","nativeName":"한국어 (韓國語), 조선말 (朝鮮語)"},
      {"code":"ku","name":"Kurdish","nativeName":"Kurdî, كوردی‎"},
      {"code":"kj","name":"Kwanyama, Kuanyama","nativeName":"Kuanyama"},
      {"code":"la","name":"Latin","nativeName":"latine, lingua latina"},
      {"code":"lb","name":"Luxembourgish, Letzeburgesch","nativeName":"Lëtzebuergesch"},
      {"code":"lg","name":"Luganda","nativeName":"Luganda"},
      {"code":"li","name":"Limburgish, Limburgan, Limburger","nativeName":"Limburgs"},
      {"code":"ln","name":"Lingala","nativeName":"Lingála"},
      {"code":"lo","name":"Lao","nativeName":"ພາສາລາວ"},
      {"code":"lt","name":"Lithuanian","nativeName":"lietuvių kalba"},
      {"code":"lu","name":"Luba-Katanga","nativeName":""},
      {"code":"lv","name":"Latvian","nativeName":"latviešu valoda"},
      {"code":"gv","name":"Manx","nativeName":"Gaelg, Gailck"},
      {"code":"mk","name":"Macedonian","nativeName":"македонски јазик"},
      {"code":"mg","name":"Malagasy","nativeName":"Malagasy fiteny"},
      {"code":"ms","name":"Malay","nativeName":"bahasa Melayu, بهاس ملايو‎"},
      {"code":"ml","name":"Malayalam","nativeName":"മലയാളം"},
      {"code":"mt","name":"Maltese","nativeName":"Malti"},
      {"code":"mi","name":"Māori","nativeName":"te reo Māori"},
      {"code":"mr","name":"Marathi (Marāṭhī)","nativeName":"मराठी"},
      {"code":"mh","name":"Marshallese","nativeName":"Kajin M̧ajeļ"},
      {"code":"mn","name":"Mongolian","nativeName":"монгол"},
      {"code":"na","name":"Nauru","nativeName":"Ekakairũ Naoero"},
      {"code":"nv","name":"Navajo, Navaho","nativeName":"Diné bizaad, Dinékʼehǰí"},
      {"code":"nb","name":"Norwegian Bokmål","nativeName":"Norsk bokmål"},
      {"code":"nd","name":"North Ndebele","nativeName":"isiNdebele"},
      {"code":"ne","name":"Nepali","nativeName":"नेपाली"},
      {"code":"ng","name":"Ndonga","nativeName":"Owambo"},
      {"code":"nn","name":"Norwegian Nynorsk","nativeName":"Norsk nynorsk"},
      {"code":"no","name":"Norwegian","nativeName":"Norsk"},
      {"code":"ii","name":"Nuosu","nativeName":"ꆈꌠ꒿ Nuosuhxop"},
      {"code":"nr","name":"South Ndebele","nativeName":"isiNdebele"},
      {"code":"oc","name":"Occitan","nativeName":"Occitan"},
      {"code":"oj","name":"Ojibwe, Ojibwa","nativeName":"ᐊᓂᔑᓈᐯᒧᐎᓐ"},
      {"code":"cu","name":"Old Church Slavonic, Church Slavic, Church Slavonic, Old Bulgarian, Old Slavonic","nativeName":"ѩзыкъ словѣньскъ"},
      {"code":"om","name":"Oromo","nativeName":"Afaan Oromoo"},
      {"code":"or","name":"Oriya","nativeName":"ଓଡ଼ିଆ"},
      {"code":"os","name":"Ossetian, Ossetic","nativeName":"ирон æвзаг"},
      {"code":"pa","name":"Panjabi, Punjabi","nativeName":"ਪੰਜਾਬੀ, پنجابی‎"},
      {"code":"pi","name":"Pāli","nativeName":"पाऴि"},
      {"code":"fa","name":"Persian","nativeName":"فارسی"},
      {"code":"pl","name":"Polish","nativeName":"polski"},
      {"code":"ps","name":"Pashto, Pushto","nativeName":"پښتو"},
      {"code":"pt","name":"Portuguese","nativeName":"Português"},
      {"code":"qu","name":"Quechua","nativeName":"Runa Simi, Kichwa"},
      {"code":"rm","name":"Romansh","nativeName":"rumantsch grischun"},
      {"code":"rn","name":"Kirundi","nativeName":"kiRundi"},
      {"code":"ro","name":"Romanian, Moldavian, Moldovan","nativeName":"română"},
      {"code":"ru","name":"Russian","nativeName":"русский язык"},
      {"code":"sa","name":"Sanskrit (Saṁskṛta)","nativeName":"संस्कृतम्"},
      {"code":"sc","name":"Sardinian","nativeName":"sardu"},
      {"code":"sd","name":"Sindhi","nativeName":"सिन्धी, سنڌي، سندھی‎"},
      {"code":"se","name":"Northern Sami","nativeName":"Davvisámegiella"},
      {"code":"sm","name":"Samoan","nativeName":"gagana faa Samoa"},
      {"code":"sg","name":"Sango","nativeName":"yângâ tî sängö"},
      {"code":"sr","name":"Serbian","nativeName":"српски језик"},
      {"code":"gd","name":"Scottish Gaelic; Gaelic","nativeName":"Gàidhlig"},
      {"code":"sn","name":"Shona","nativeName":"chiShona"},
      {"code":"si","name":"Sinhala, Sinhalese","nativeName":"සිංහල"},
      {"code":"sk","name":"Slovak","nativeName":"slovenčina"},
      {"code":"sl","name":"Slovene","nativeName":"slovenščina"},
      {"code":"so","name":"Somali","nativeName":"Soomaaliga, af Soomaali"},
      {"code":"st","name":"Southern Sotho","nativeName":"Sesotho"},
      {"code":"es","name":"Spanish; Castilian","nativeName":"español, castellano"},
      {"code":"su","name":"Sundanese","nativeName":"Basa Sunda"},
      {"code":"sw","name":"Swahili","nativeName":"Kiswahili"},
      {"code":"ss","name":"Swati","nativeName":"SiSwati"},
      {"code":"sv","name":"Swedish","nativeName":"svenska"},
      {"code":"ta","name":"Tamil","nativeName":"தமிழ்"},
      {"code":"te","name":"Telugu","nativeName":"తెలుగు"},
      {"code":"tg","name":"Tajik","nativeName":"тоҷикӣ, toğikī, تاجیکی‎"},
      {"code":"th","name":"Thai","nativeName":"ไทย"},
      {"code":"ti","name":"Tigrinya","nativeName":"ትግርኛ"},
      {"code":"bo","name":"Tibetan Standard, Tibetan, Central","nativeName":"བོད་ཡིག"},
      {"code":"tk","name":"Turkmen","nativeName":"Türkmen, Түркмен"},
      {"code":"tl","name":"Tagalog","nativeName":"Wikang Tagalog, ᜏᜒᜃᜅ᜔ ᜆᜄᜎᜓᜄ᜔"},
      {"code":"tn","name":"Tswana","nativeName":"Setswana"},
      {"code":"to","name":"Tonga (Tonga Islands)","nativeName":"faka Tonga"},
      {"code":"tr","name":"Turkish","nativeName":"Türkçe"},
      {"code":"ts","name":"Tsonga","nativeName":"Xitsonga"},
      {"code":"tt","name":"Tatar","nativeName":"татарча, tatarça, تاتارچا‎"},
      {"code":"tw","name":"Twi","nativeName":"Twi"},
      {"code":"ty","name":"Tahitian","nativeName":"Reo Tahiti"},
      {"code":"ug","name":"Uighur, Uyghur","nativeName":"Uyƣurqə, ئۇيغۇرچە‎"},
      {"code":"uk","name":"Ukrainian","nativeName":"українська"},
      {"code":"ur","name":"Urdu","nativeName":"اردو"},
      {"code":"uz","name":"Uzbek","nativeName":"zbek, Ўзбек, أۇزبېك‎"},
      {"code":"ve","name":"Venda","nativeName":"Tshivenḓa"},
      {"code":"vi","name":"Vietnamese","nativeName":"Tiếng Việt"},
      {"code":"vo","name":"Volapük","nativeName":"Volapük"},
      {"code":"wa","name":"Walloon","nativeName":"Walon"},
      {"code":"cy","name":"Welsh","nativeName":"Cymraeg"},
      {"code":"wo","name":"Wolof","nativeName":"Wollof"},
      {"code":"fy","name":"Western Frisian","nativeName":"Frysk"},
      {"code":"xh","name":"Xhosa","nativeName":"isiXhosa"},
      {"code":"yi","name":"Yiddish","nativeName":"ייִדיש"},
      {"code":"yo","name":"Yoruba","nativeName":"Yorùbá"},
      {"code":"za","name":"Zhuang, Chuang","nativeName":"Saɯ cueŋƅ, Saw cuengh"}
    ]

Answer 5

It is available in HTML via the link you have posted in your question :) Seriously, if that list in Wikipedia is complete, than it is easy to grab it using lxml.html (in Python) or any similar library in your favorite language.

Answer 6

This PHP function will convert the language code to the language name, using the Library of Congress data file:

function lang_code_to_name($code)
{
    // init
    $lines = array();
    $line_items = array();
    $language = '';
    $code = strtolower($code);

    // strip any possible sub-language
    $pos = strpos($code, '-');
    if ($pos) {$code = substr($code, 0, $pos);}

    // get code list from Library of Congress
    // format: five elements per line
    // ISO 639-2 Alpha-3 bibliographic code|ISO 639-2 Alpha-3 terminology code|ISO 639-1 Alpha-2 code|English language name(s)|French language name(s)
    $url = 'http://loc.gov/standards/iso639-2/ISO-639-2_utf-8.txt';
    $list = file_get_contents($url);

    if (!$list) {return $language;}

    // read the file
    $lines = explode("\n", $list);
    for ($i; $i < sizeof($lines); $i++)
    {
        $line_item = explode("|", $lines[$i]);
        if (($line_item[0] == $code) || ($line_item[1] == $code) || ($line_item[2] == $code))
        {
            $language = $line_item[3];
            break;
        }
    }

    // exit
    return $language;
}