QuitGame asking window

[xerca]

When we say Quitgame(1), it asks player if they are sure about quitting but it asks in english. I made every writing in my language but I couldn't change that. My friends asked me why it is in English (they all know english in fact but I just want to do my game in my language. when that window is written in English it looks strange) Can I change it? and if i can, how can i change it? Also if this question should be posted in beginners forum i'm sorry but i thought this is advanced enough not to be a beginner's problem.
edit: I now thought a solution. I could make a new gui and use it. I will now try
edit2: Allright it works. that's the best way (it worked a long time ago but my internet was gone)

[Gilbert]

As far as I remember, the QuitGame() dialog was hardcoded and could not be changed (it was a leftover from old versions), so yeah, the best solution is to make your own GUI.