No support for ISO 639-2 languages

Since Android 5.0 and up it's possible to use ISO 639-2 languages but F-droid lacks of it. In the wiki there is at least one language called Asturian which uses this regulation.

I guess the auto-translations-import script from the wiki doesn't work with 3 letter code languages and that's a problem. I provide you links to bugs in AOSP about this question: