JavaScript - get the complete list of locales supported by the browser

Question

I've found supportedLocalesOf, but is there a way to get all supported locales, not just check which among a given list are supported?

The '*' tag option described in this 2012 post no longer works.

Bisector

Hello Dan, I read your blog on English as a global language and it rang a bell in my own experience as a third language learner turned quasi-fluent and a constant advocate of English is the only skill you learn at school that will last a lifetime. I noticed that both dandascalescu.com and dandv.me are inaccessible. Do you intend to reduce your Internet exposure? – Solange

Answer 1

You may use npm ISO-639-1 to list them. It's safe to assume that all browsers use the 639-1 column shown in this table from wikipedia as their standard support.

Or use the following hardcoded list

[
    ['Abkhazian', 'ab'],
    ['Afar', 'aa'],
    ['Afrikaans', 'af'],
    ['Akan', 'ak'],
    ['Albanian', 'sq'],
    ['Amharic', 'am'],
    ['Arabic', 'ar'],
    ['Aragonese', 'an'],
    ['Argentina', 'es-ar'],
    ['Armenian', 'hy'],
    ['Assamese', 'as'],
    ['Avaric', 'av'],
    ['Avestan', 'ae'],
    ['Aymara', 'ay'],
    ['Azerbaijani', 'az'],
    ['Bambara', 'bm'],
    ['Bashkir', 'ba'],
    ['Basque', 'eu'],
    ['Belarusian', 'be'],
    ['Bengali (Bangla)', 'bn'],
    ['Bihari', 'bh'],
    ['Bislama', 'bi'],
    ['Bosnian', 'bs'],
    ['Breton', 'br'],
    ['Bulgarian', 'bg'],
    ['Burmese', 'my'],
    ['Catalan', 'ca'],
    ['Chamorro', 'ch'],
    ['Chechen', 'ce'],
    ['Chichewa, Chewa, Nyanja', 'ny'],
    ['Chinese', 'zh'],
    ['Chinese (Simplified)', 'zh-Hans'],
    ['Chinese (Traditional)', 'zh-Hant'],
    ['Chuvash', 'cv'],
    ['Cornish', 'kw'],
    ['Corsican', 'co'],
    ['Cree', 'cr'],
    ['Croatian', 'hr'],
    ['Czech', 'cs'],
    ['Danish', 'da'],
    ['Divehi, Dhivehi, Maldivian', 'dv'],
    ['Dutch', 'nl'],
    ['Dzongkha', 'dz'],
    ['English', 'en'],
    ['Esperanto', 'eo'],
    ['Estonian', 'et'],
    ['Ewe', 'ee'],
    ['Faroese', 'fo'],
    ['Fijian', 'fj'],
    ['Finnish', 'fi'],
    ['French', 'fr'],
    ['Fula, Fulah, Pulaar, Pular', 'ff'],
    ['Galician', 'gl'],
    ['Gaelic (Scottish)', 'gd'],
    ['Gaelic (Manx)', 'gv'],
    ['Georgian', 'ka'],
    ['German', 'de'],
    ['Greek', 'el'],
    ['Greenlandic', 'kl'],
    ['Guarani', 'gn'],
    ['Gujarati', 'gu'],
    ['Haitian Creole', 'ht'],
    ['Hausa', 'ha'],
    ['Hebrew', 'he'],
    ['Herero', 'hz'],
    ['Hindi', 'hi'],
    ['Hiri Motu', 'ho'],
    ['Hungarian', 'hu'],
    ['Icelandic', 'is'],
    ['Ido', 'io'],
    ['Igbo', 'ig'],
    ['Indonesian', 'id, in'],
    ['Interlingua', 'ia'],
    ['Interlingue', 'ie'],
    ['Inuktitut', 'iu'],
    ['Inupiak', 'ik'],
    ['Irish', 'ga'],
    ['Italian', 'it'],
    ['Japanese', 'ja'],
    ['Javanese', 'jv'],
    ['Kalaallisut, Greenlandic', 'kl'],
    ['Kannada', 'kn'],
    ['Kanuri', 'kr'],
    ['Kashmiri', 'ks'],
    ['Kazakh', 'kk'],
    ['Khmer', 'km'],
    ['Kikuyu', 'ki'],
    ['Kinyarwanda (Rwanda)', 'rw'],
    ['Kirundi', 'rn'],
    ['Kyrgyz', 'ky'],
    ['Komi', 'kv'],
    ['Kongo', 'kg'],
    ['Korean', 'ko'],
    ['Kurdish', 'ku'],
    ['Kwanyama', 'kj'],
    ['Lao', 'lo'],
    ['Latin', 'la'],
    ['Latvian (Lettish)', 'lv'],
    ['Limburgish ( Limburger)', 'li'],
    ['Lingala', 'ln'],
    ['Lithuanian', 'lt'],
    ['Luga-Katanga', 'lu'],
    ['Luganda, Ganda', 'lg'],
    ['Luxembourgish', 'lb'],
    ['Manx', 'gv'],
    ['Macedonian', 'mk'],
    ['Malagasy', 'mg'],
    ['Malay', 'ms'],
    ['Malayalam', 'ml'],
    ['Maltese', 'mt'],
    ['Maori', 'mi'],
    ['Marathi', 'mr'],
    ['Marshallese', 'mh'],
    ['Moldavian', 'mo'],
    ['Mongolian', 'mn'],
    ['Nauru', 'na'],
    ['Navajo', 'nv'],
    ['Ndonga', 'ng'],
    ['Northern Ndebele', 'nd'],
    ['Nepali', 'ne'],
    ['Norwegian', 'no'],
    ['Norwegian bokmål', 'nb'],
    ['Norwegian nynorsk', 'nn'],
    ['Nuosu', 'ii'],
    ['Occitan', 'oc'],
    ['Ojibwe', 'oj'],
    ['Old Church Slavonic, Old Bulgarian', 'cu'],
    ['Oriya', 'or'],
    ['Oromo (Afaan Oromo)', 'om'],
    ['Ossetian', 'os'],
    ['Pāli', 'pi'],
    ['Pashto, Pushto', 'ps'],
    ['Persian (Farsi)', 'fa'],
    ['Polish', 'pl'],
    ['Portuguese', 'pt'],
    ['Punjabi (Eastern)', 'pa'],
    ['Quechua', 'qu'],
    ['Romansh', 'rm'],
    ['Romanian', 'ro'],
    ['Russian', 'ru'],
    ['Sami', 'se'],
    ['Samoan', 'sm'],
    ['Sango', 'sg'],
    ['Sanskrit', 'sa'],
    ['Serbian', 'sr'],
    ['Serbo-Croatian', 'sh'],
    ['Sesotho', 'st'],
    ['Setswana', 'tn'],
    ['Shona', 'sn'],
    ['Sichuan Yi', 'ii'],
    ['Sindhi', 'sd'],
    ['Sinhalese', 'si'],
    ['Siswati', 'ss'],
    ['Slovak', 'sk'],
    ['Slovenian', 'sl'],
    ['Somali', 'so'],
    ['Southern Ndebele', 'nr'],
    ['Spanish', 'es'],
    ['Sundanese', 'su'],
    ['Swahili (Kiswahili)', 'sw'],
    ['Swati', 'ss'],
    ['Swedish', 'sv'],
    ['Tagalog', 'tl'],
    ['Tahitian', 'ty'],
    ['Tajik', 'tg'],
    ['Tamil', 'ta'],
    ['Tatar', 'tt'],
    ['Telugu', 'te'],
    ['Thai', 'th'],
    ['Tibetan', 'bo'],
    ['Tigrinya', 'ti'],
    ['Tonga', 'to'],
    ['Tsonga', 'ts'],
    ['Turkish', 'tr'],
    ['Turkmen', 'tk'],
    ['Twi', 'tw'],
    ['Uyghur', 'ug'],
    ['Ukrainian', 'uk'],
    ['Urdu', 'ur'],
    ['Uzbek', 'uz'],
    ['Venda', 've'],
    ['Vietnamese', 'vi'],
    ['Volapük', 'vo'],
    ['Wallon', 'wa'],
    ['Welsh', 'cy'],
    ['Wolof', 'wo'],
    ['Western Frisian', 'fy'],
    ['Xhosa', 'xh'],
    ['Yiddish', 'yi', 'ji'],
    ['Yoruba', 'yo'],
    ['Zhuang, Chuang', 'za'],
    ['Zulu', 'zu'],
]

Valarievalda

the values of mentioned library on GitHub are quite different than the ones provided as the hardcoded list: github.com/meikidd/iso-639-1/blob/master/src/data.js but the answer implies that both of them contain same values and so are interchangable. – Destefano

Answer 2

The locale used and the form of the string returned are entirely implementation-dependen. It uses a string with a BCP 47 language tag. It is somehow still related to unicode locale.

You still can find the list of locales argument in Country Code list. But if some of the country code does not work, you can go UNICODE LOCALE DATA MARKUP LANGUAGE (LDML) to see the list of correct locales implemented there.

Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_identification_and_negotiation

Horsehide

Thanks for actually referencing something meaningful instead of pointing to some nonsense, referenceless, list made-up by an unaccountable nobody. For anyone who just wants to view the language-region/locale codes, go to CLDR Unicode org, go to Downloads, pick a version in the Charts column, click the ICU Locale Explorer, and you'll see it. – Sandblind

Answer 3

I looked at this a little bit, and did some testing use Chrome.

navigator.languages

This returns an array of supported languages. Initially mine was only en-Us and en, however I added Welsh, and it was returned.

Downstroke

It only return the current language the browser use – Horsehide

It's not the list of supported languages, it's the list of languages which the client said they want. The first one is most specific, the later ones are fallbacks. – Koski