Link for translate language pairs does not have valid pairs
The comment in https://gitlab.gnome.org/GNOME/gedit-plugins/-/blob/master/plugins/translate/org.gnome.gedit.plugins.translate.gschema.xml#L11-14 says the link "has a list of valid pairs".
But it seems like "'dan|nob'" would be a valid pair not "apertium-dan-nor" or even "'dan|nor'".