|Open||None||T124286 [Epic] Wikidata language support|
|Open||None||T144272 new monolingual language code requests for Wikidata (tracking)|
|Stalled||None||T155419 Add monolingual language code mix (Mixtec)|
This is a tough one. According to this there are 52 (!) different codes for Mixtec languages, so just calling this Mixtec is clearly not right. The code mix is for Mixtepec Mixtec, so if that's what this request is for, that should be OK, but as a code for all Mixtec languages mix can't be used.