I wish you every success in your future move. You mentioned that you were looking in the valais, I am sure that they are not allowing foreigners to buy at present but this might have changed.I am sure that one of the EF members will correct me .
We live half the year in Vaud & half in the UK (2 at UNI). You can get much more for your money property wise away from Lake Leman. We are near Yverdon so have Lake Neuchatel.
You will find it tough without the language, Mr Smackerjack has never got to grips with it. Just persevere and you will be fine. The tough days always feel better when you look out of the window and see the beautiful views