A translations resource for version 0.10.x (latest master in git) has been added. You can start translating messages for the next major version. The messages from version 0.9.x have been pre-seeded, but new and modified messages will appear untranslated again.
https://www.transifex.com/projects/p/bitcoin/resource/qt-translation-010x/
If you have any questions, let me know.
Wladimir