My localisation went weird after the last upgrade too. SDDM shows ?? as my locale now, instead of Australia
KDE
KDE is an international technology team creating user-friendly free and open source software for desktop and portable computing. KDE’s software runs on GNU/Linux, BSD and other operating systems, including Windows.
Plasma 6 Bugs
If you encounter a bug, proceed to https://bugs.kde.org, check whether it has been reported.
If it hasn't, report it yourself.
PLEASE THINK CAREFULLY BEFORE POSTING HERE.
Developers do not look for reports on social media, so they will not see it and all it does is clutter up the feed.
@ada @guillermohs9 Did you get a tzdata update? Maybe it was set wrong by mistake. I'd use timedatectl to check it.
I will look into it later, but even after selecting Spanish (from Spain) as system language, several strings remain untranslated, which is weird, because I remember seeing them in Spanish before.
Any idea what file in my .config can I change / delete to reset language settings?
I have a few things in my Plasma desktop that is not translated. So it seems to be the same as you encounter.
I've just learned to live with it, since it's likely just untranslated strings somewhere.