This is a small library providing the ISO-639 language code to language name mapping.

After loading the library, simply use names to retrieve the list of known names for a language code.

(language-codes:names :eng)      ; => ("English")
(language-codes:names :ht)       ; => ("Haitian" "Haitian Creole")

You can also perform the inverse lookup, by codes.

(language-codes:codes "english") ; => (:ENG :EN)