Hi Abu Mojahed,
I am not really sure, but I think that Alwil are not quite ready for translators yet. When the time comes, I'm sure there will be a thread in the forum or something like that.
I think they are still deciding when to start the translations for the new version.
It might be a good idea to see this thread as well:
http://forum.avast.com/index.php?topic=46976.0-Scott-