language-subtag-registry

Full BCP 47 language subtag data from the official IANA repository, in JSON format with multiple indices.

larvitgeodata

Geo data, primarily ISO territories, languages etc. Data fetched mostly from CLDR.

lang-map

Get the language associated with a file extension or the extensions associated with a language using the data from GitHub's [Linguist YAML file](https://github.com/github/linguist/blob/master/lib/linguist/languages.yml)