I wanna present all of you very usefull site.
With this site you can have your app in many languages very, very easy.
This is 99translations:
Only that you must to do, is create a project named like your app, and include all phrases from your app.
A volunteer (or with some cash, everyone can set how much want in $ for translate one word in profile)
from other countries can open your project and translate phrases to own language.
I worked (for free) with this site at "Buddycloud" project - a Symbian social app (mix of Twitter and iRC):
Translating process is very, very easy. Translator can use a Google Translator for help:
Also project author having many, very useful tools. For example if you need one specific translation, you can choose your translator from list ("People tab")
More info for app developers you can find in "Tools" tab: