Hi Angelin,
There's now a cool tool to address this: it's called AMOS and you can access it at this location: http://lang.moodle.org/.
Moreover, you'll find some documentation for this tool at this address: http://docs.moodle.org/en/Translation_2.0.
Don't forget to get in touch with the maintainer of your language's Moodle translation!
Good luck,
Nicolas