This post is about C# and .Net, but some info is valuable for other techonolgies.
Since I can remember, I\'ve been having problems with apps or games that c
Properly set Thread.CurrentThread.CurrentCulture and you wont have such problems.
Read here how to write culture independent code.
EDIT: If you do not have access to the code, you can run the application under a user account which has the expected culture set. For quick access you could create an english user, a german user, a french user..