http://bugs.winehq.org/show_bug.cgi?id=21413
--- Comment #11 from Rosanne DiMesio dimesio@earthlink.net 2010-01-19 13:18:18 --- If you want MS Word to use alt-a to insert a Polish a, just assign it to that shortcut:
Insert=>Symbol Select the character you want to assign to a key Click the Shortcut Key button Press alt-a (or whatever key combination you want) Click Assign Click Close
Works fine on my system, even with the en_US locale and keyboard.