That would depends from what you expect from a bank; Switzerland being trilingual, English is often added as a fourth option (as documents are not produced usually in Rumantsch).
I have accounts both with UBS and BCV; very similar excellent advice; I prefer the internet banking User interface by UBS (and find it marginally more secure). I also have an account with Raffheisen - a local bank; it is smaller and closer to customers.
I know in many situations, expats prefer UBS as it has a bigger international presence, and you will be able to bank in many countries; biggest exception of course being the US

(