Installing a new locale

Is it possible to install a new locale in bazzite? I found this guide on GitHub: https://github.com/saschaeggi/gnome-locale-en_CH But when I try to follow it I get error messages in the terminal.

GitHub

GitHub - saschaeggi/gnome-locale-en_CH: Custom English Gnome locale...

Custom English Gnome locale for Switzerland. Contribute to saschaeggi/gnome-locale-en_CH development by creating an account on GitHub.