Returns a list of supported languages for translation.
Details
Supported language codes generally consist of their ISO 639-1 identifiers (e.g., 'en', 'ja').
In certain cases, BCP-47 codes including language + region identifiers are returned (e.g., 'zh-TW', 'zh-CH').
See also
https://cloud.google.com/translate/docs/reference/languages
Other translations:
gl_translate(),
gl_translate_detect(),
gl_translate_document()
