The topic is useful but poorly documented in many online sources. Most guides focus on older VW, SEAT, Škoda, or Audi models equipped with the RNS 300 (a basic navigation/radio unit, often from Blaupunkt or similar, used around mid-2000s to early 2010s).
If you cannot find "Language" using the method above, try these alternatives:
Mark tapped the Sprache menu. A new window popped up with a list of available languages: how+on+rns+300+change+language+new
He highlighted English (or Englisch as it appeared in the German list) and pressed the checkmark or the "OK" button on the touchscreen.
If you are reading this from your driver’s seat with a German menu staring back at you, here is the bare-bones version: Overall Assessment: The topic is useful but poorly
Done. Your RNS 300 is now in English.
But what if you want another language? Or what if your menu is in French, Italian, or Spanish? Read on for the full, universal guide. What If That Doesn't Work
A: No. Language change only affects on-screen text. Your saved radio stations and navigation favorites remain intact.
Inside the System menu, you will see a list:
Scroll until this line is highlighted.
He tapped the "Settings" menu. A long list of options appeared. He scrolled down looking for the word Sprache (Language). On the RNS 315/510 systems, this is usually the very first or second option in the setup menu.