Working & Languages in Switzerland
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Hi Roula,
If you want to come to Switzerland I would strongly recommend to learn the language of the region you are going to live in if you want to integrate. English is not so common for daily life, at least in the french region, so if you don't want to be stuck to communicating only with expats you need the local region.
About the most common, it depends on the region, in the french part they only speak french, no german or italian, and so on.