Adding a language

I am trying to add a film, but the problem is, it's in a language that's not on the list. The language is Kashubian (Cassubian). Could this language be added to the database? https://en.m.wikipedia.org/wiki/Kashubian_language https://www.loc.gov/standards/iso639-2/php/langcodes_name.php?code_ID=104 https://iso639-3.sil.org/code/csb https://glottolog.org/resource/languoid/id/kash1274 https://www.endangeredlanguages.com/lang/3454