This question is addressed in this months official nintendo magazine.
Basicaly, japan get the games first cuz they are made there (duh) next it is a streight translation into english for amaica, fairly easy. Europe is the problem, they need to translate into french, german, spanish at a minimum, some games have polish, russian all sorts of weird european languages. but it's not just the translation of words, they have to record some voices all over again and check that the timings are right so that when you press a button the correct sound at the correct time is there.
The moral of this story, go live in americal, australia or japan.