I just saw a tweet from Arduino team member, David Cuartielles, requesting help in translating the Arduino IDE:
http://arduino.cc/playground/Main/LanguagesIDE
TRANSLATIONS OF THE IDE
From version 1.01 of Arduino's IDE, you will be able of choosing your preferred language. For that to happen we need your help in translating a text file that contains all the different strings in the IDE: from menu names to error messages.
I know we have a very diverse community here, so I figured this would be a good place to post about this effort.
Cheers,
Drew