Ask HN: Translating Android

I would like to translate Android into my native language (Swazi). I am not referring to translating the text in a specific application. Instead, I am interested in translating the core UI/system.

Additionally, I would like to improve the translation for my second language, Zulu, which exists in Android, but would do with some improvement.

Does anyone know how to go about doing that? Searching the web seems to only give me results related to app translation.