My issue is, that I want to change the Language to German (de_CH) and BBPress etc. should change the language too.
I know not all Plugins are available in German. However whatever I do, add them manually, add them with Loco Translate plugin, or trying to switch the language in the General Wordpress settings, it will not change anything.
I very much assume that I have all the permissions set correctly on my server because I did it as the documentation of Wordpress tells me.
Does anyone have a clue what could be the issue? (I can, however, change the Wordpress language itself without a problem)