The last question has an error. There are four languages spoken by more than 5% of the Swiss people, per 2018. German (62.9%), French (22.9%), Italian (8.4%), and English (5.9%).
Oh thanks! I'm surprised to see that, I mean most immigrants are from the neighboring countries and ex-Yugoslavia, so where are these English speakers coming from? Guess I have to increase the percentage in the question.
Maybe you should mention that you mean native speakers. Because I think more than 10% of Swiss people speaks English as a second language. And I would be surprised if less than 1.6% of Swiss speak Italian as a second language.
Source: Wikipedia