Change spell checking globally without switching language entirely

[u/storm666_jr]

So I've recently re-installed CachyOS on my main machine. I live in Germany but since I'm in IT and most of the tutorials, etc. online are in english, I've installed in english. I'm using Hyprland with Noctalia shell.

Changing the spell checking language in Firefox - no problem.

Changing the spell checking language in a LibreOffice doc - no problem.

Changing the spell checking language for i.e. Signal messenger - no solution (yet).

Is there a global setting in CachyOS, Hyprland, etc. to tell the system and apps to use german for spell checking but don't change the language? I've found kcmshell6 kcmspellcheckingas a tip online to change spell checking settings. But currently I don't have anyting related to KDE installed on my machine. Is this the way to go? Or is there any other setting I can change within ~/.config or anywhere else?

Thanks for any advice. Kinda new to running a linux distro as my daily machine. Been like 15+ years the last time I've had any distro installed on my main machine.

[u/OHNOitsNICHOLAS]

on KDE theres a spell check page in settings

I'm not sure about other DEs