“Auf” instead of “zu”

I have just seen this sentence “Bitte ändern Sie die Telefon Sprache auf Englisch” which means “Please change the phone language to English”.

Why do we use “auf” here and not “zu”? As far as I have learn “auf” means on and “zu” means to.
 

Hallo RexV,

Auf is used with languages - auf Englisch, auf Deutsch, auf Französisch, etc. This could be translated as either "in English / German / French," or "to English / German / French," depending on the context.

Bis bald,

Liss