- Edited
Hi, I just started on Czech translation. It's incomplete so far but most of the user-facing strings are translated. Admin page translation is on to-do and there are some text that are part of the source code of other extensions and therefore untranslatable (at least I don't know if they are) - mostly registration and notification e-mail bodies.
https://github.com/cptMikky/flarum-ext-czech
composer require flarum-ext-czech