Something I thought about because of the Weblate migration, but can be done independently:

It would be nice to see a table like this directly inside Matomo using live data. This way it would never need to be outdated and could be combined with other information about translating Matomo

Just like console translations:languageinfo this could use \Piwik\Plugins\LanguagesManager\API::getAvailableLanguagesInfo() which should also contain the information about the translators from General_TranslatorName.

I'm just not sure where to put this page. At Platform besides "API" and "Widgets" seems a bit too prominent. So maybe the Feedback page (the (i) in the top right) might be better suited.