> Are there any plans to have a 2.5dev language pack version for all languages available in AMOS and download.moodle.org in the near future ?
Yes. Our standard procedure is to create new branch in AMOS shortly after the release. Please note that at the moment, there is still no actuall 2.5dev-only development. Only fixes for 2.4 are sent there, too. So you don't really need to test 2.5 yet.