Sorry Nathalie, I'm afraid I didn't carefully read your post. Because I'm using a swiss keyboard which is most convenient for my language pairs, I never run in these problems: it has all possible strokes at my disposal and I can switch to one of the languages in Windows. I guess you could do the same with *any* keyboard by loading the appropriate language options in Windows, but a solution for your question is still outstanding, I hope someone else will intervene.
[Edited at 2017-01-17 22:26 GMT]
You're welcome. I use a French azerty keyboard.