all-iso-language-codes

List of ISO 639-1, 639-2T, 639-2B and 639-3 codes with translations in all available languages

Sometimes you need to get a fresh list of 639-1, 639-2T, 639-2B or 639-3 language codes and their translations. Until now there was not an easy way to get them.

All data are available in json format in data/[language]/639-1.json. More formats might be available in the future.

Usage

• JS functions (with TS type definitions included)
• Directly, using files located in data folder

JS functions

Function	Arguments	Return value	Example usage
getEnglishName(code: string)	language code	string | null	getEnglishName('cs') => Czech
getNativeName(code: string)	language code	string | null	getNativeName('cs') => čeština
getName(code: string, language = 'en')	from language, to language?	string | null	getName('cs', 'en') => Czech
isValid(code: string, availableIsoTypes?: IsoType[], moreInfo = false)	language code, IsoType (below table), moreInfo	boolean | { iso: IsoType | null; found: boolean; }	isValid('cs') => true, isValid('cs', ['639-1'], true) => { iso: '639-1'; found: true; },
getIsoCodesFromNativeName(nativeName: string, normalizeString = false)	language name, should normalize string (lowercase and remove diacritics)	IsoType[] | null	getIsoCodesFromNativeName('ČeŠtInA', true) => ['639-3', '639-2B', '639-2T', '639-1']
getAll639_1()	-	string[] (639-1 array)	getAll639_1() => ['aa', 'ab', 'af'...]
getAll639_2B()	-	string[] (639-2B array)	getAll639_2B() => ['aar', 'abk', 'ace'...]
getAll639_2T()	-	string[] (639-2T array)	getAll639_2T() => ['aar', 'abk', 'ace'...]
getAll639_3()	-	string[] (639-3 array)	getAll639_3() => ['aaa', 'aab', 'aac'...]

type IsoType = '639-1' | '639-2B' | '639-2T' | '639-3'

File format

If you have some ideas (csv, another JSON format...) let me know or create PR.

Adding more languages

Language matrix is generated by Node.js Intl API (version 23.10.0). If you would like to edit something, Create PR in Node.js Intl API. Wait until release and run yarn generate.

Tests

There are jest tests which tests basic functionality. Feel free to extend them or convert to vitest.

More info

Getting the list of all available languages is from official list

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