And for the Swiss Romande (French speaking part of Switzerland)?

We need a German QWERTZ keyboard with special characters in French (é,è,à,ê,etc..).

Is it possible to have a German keyboard and get the special character in press a special button and then press the button of the letter to change?
For exemple, in N810: [Chr] + [e] = é ; [Chr] + [e]x2 = è ; Etc..