The localization docs lacks crucial information

https://github.com/Mailu/Mailu/blame/91d571aec87e43493fcc0eab4cb9a5620cd1f9d8/docs/contributors/localization.rst

OK, now that I know what Poedit is, what should I do to contribute? Where are the files? Should I file a PR? How do I update the localization file? Is it updated automatically? Is there a template?

Thanks :)