Using MS Office in Wine with some keyboard layouts (e.g. us_international) that involve letters that need the Alt Gr key, I noticed that it does not work. But it turns out the problem affects all keyboard layouts.
All works well in the Linux/Ubuntu text editors (Leafpad, Gedit) and in LibreOffice; I have found the same problem in Notepad, and I imagine it is true for all text editing under Wine. (Even using text in a music player like foobar2000 involves the same problem).
What is the cause of this - and can this be fixed?
I'm using Xfce
I found this problem reported on here on Ubuntu Forums, but I cannot see how the Wikipedia link posted there can help.