Help me get started on Crowdin

git is for finding (=problem description in your post),not for pull requests. Unless you want to buckets of water to the sea… .
https://forum.inaturalist.org/t/introduction-to-translation-with-crowdin/23890
https://help.inaturalist.org/en/support/solutions/articles/151000194744-can-i-help-translate-inaturalist-

If you knew how git worked, you should have found out that making pull requests is not the way to solve this problem. And you do not even have to dig deep for this, not even two weeks.

https://crowdin.com/project/inaturalistweb/discussions/18