Lingua.language_for_iso_code_639_1

You're seeing just the function language_for_iso_code_639_1, go back to Lingua module for more information.
Link to this function

language_for_iso_code_639_1(code)

Get the language for the given ISO 639-1 language code.

Example

iex> Lingua.language_for_iso_code_639_1(:en)
{:ok, :english}
iex> Lingua.language_for_iso_code_639_1(:er)
{:error, :unrecognized_iso_code}