>>3633387that's only necessary if you want to move to the french part of switzerland. I was born and live here in basel and can barely speak any french and get by just fine.
>>3633435German would be very good to know though. Young people do speak english more or less fluent, older people on the other hand often don't. Speaking german will help you a lot, and it will be much easier to make connections and new friends this way, even with younger people.