Fully translate a prompt
Fully translate a prompt

We were not translating the strings 'user' and 'system'
here, although we should.

Closes: #1984

Closes: #2520
Approved by: matthiasclasen

flatpak/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak,flatpak/flatpak,flatpak/flatpak,flatpak/flatpak,flatpak/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak