Write the button sequence down on a sticky note and put it in your glovebox: Menu > System > Language > Turn Right Knob. If your battery ever dies or you accidentally reset the unit, you won't need to search the internet again.
Unlike modern smartphones, changing the language on the is not obvious. There is no dedicated "Language" button. Because this unit was produced before touchscreens became standard, you must navigate using specific hardware buttons and a cryptic menu structure. how+on+rns+300+change+language+new
Need further help? Consult the official VW RNS 300 manual (page 43) or visit a VW forum with your specific firmware version (found by holding "MENU" for 10 seconds). Write the button sequence down on a sticky
The unit is not intuitive by modern standards, but once you learn that the scroll knob simultaneously selects and cycles values, the mystery disappears. If you follow the above, you should have your Volkswagen or SEAT navigation system displaying English (or your preferred tongue) in under 45 seconds. There is no dedicated "Language" button