[Ayesh]

Not OP, but I have so e experience particularly in Zurich. English is widely spoken by a majority of the people you'll be working with, but some sort of basic German can go a very long way. Compared to other cities like Paris or Strasbourg (other tech-ish cities), Zurich is far more English friendly, perhaps only second to Amsterdam.

[seanmcdirmid]

It’s a bit harder in French Switzerland, particularly Lausanne, some of the people don’t speak English or simply don’t want to. Still not that bad, however.

The police l, if you have to interact with them, might treat you more roughly if you don’t speak the local language.