GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.
In #20628 (moved) we added bn-BD, da, he, sv, zh-TW. We have still more languages for which Tor Browser translations are complete:
Let's add some more when we feel satisfied that the first batch are working properly.