Description
I dont exactly know if this is actually the right place, cause systemd is a whole ecosystem, but this is an issue that came up when testing ParticleOS.
Having installed the arch KDE Flavor here.
Currently, the system locale is set to LANG=C.UTG-8.
Which is all good and well if you are natively english-speaking, or just want everything to be set to english. Not when you want to use other languages.
In my specific usecase, i want to use german language, which I can set for some parts of Plasma itself within the system settings, but many of the things, like Dolphin or several KCMs or Discover depend on reading the Locale to get the language.
It doesnt bother me too much that the settings kcm can't set the locale automatically, but when trying to do localectl set-locale LANG=de_DE.UTF-8 it only comes up with
"Failed to issue method call: Locale de_DE.UTF-8 not installed, refusing."
Logically, in the attempt to be immutable, and being dogfood for all parts of systemd, pacman has no repositories set, so one can't install the prerequisites to generate the locale.
It probably should go into homectl firstboot or systemd-firstboot, but you should be able to set your systems locale there.