I feel like I will release new Wammu version in two or three weeks, it would be great to improve some translations. All you need to do is to login into our Pootle server and translate these few (or not so few) strings missing in your language.
If you still prefer manual work, you can still just get po file from Git and send me updates.
PS: If your translation is missing in Pootle and you want to start it, just drop me a note.