Dual gpu, intel and nvidia, and external monitor

English Hardware
8

To list all available (installed) locales, simply type localectl list-locales in a terminal.

Then you can set the one you want from this list.

As example english US:
sudo localectl set-locale LANG=en_US.UTF-8

Or for italien IT:
sudo localectl set-locale LANG=it_IT.UTF-8

To check, if the change was properly applied, type locale in a terminal.