We've made a public project of warsow Warsow Localizations. So anybody from the community can help us to translate this game. At first you'll need to sign up in order to edit localizations.

>>> warsow.oneskyapp.com <<<

It is quite simple and useful: there are overall translation progress bars, possibility to find only missing strings, you can use different available languages as a source. Translation consists of 3 part:
1) main
2) cgame
3) ui

Also not all available strings are shown at one page, make sure you have checked bottom right to see over pages. If you want to work on other languages - post a message about your wish here in this thread.

Source: http://www.warsow.net/forum/thread/16365/1