http://bugs.winehq.org/show_bug.cgi?id=22287
--- Comment #12 from Jaime jskartman@gmail.com 2010-05-10 13:22:55 --- (In reply to comment #11)
Thats no problem, just run your app with:
cd path/to/your/app LANG=es_ES.UTF-8 wine yourapp.exe
That is working, but i dont have spanish locales installed so I am not sure that the program is not fallback to english ¿?