Is an international driving licence required in Switzerland?

Answer 1

No, it's not required: "Drivers from abroad may drive in Switzerland while one years time if they have a valid national driver's licence, delivered by the state of residence. If you would drive Swiss heavy lorries, buses or taxis for professional reasons, you would need a Swiss licence before the first professional ride."

Answer 2

Absolutely not, but make sure that your license will be valid for at least six months after your visit. Don't cut it too close.