I found the example strings in: https://github.com/GNOME/pango/blob/master/pango/pango-language-sample-table.h
and the string selection here: https://github.com/GNOME/gnome-font-viewer/blob/827b338762d45535718be637a838a75f8c218f7d/src/sushi-font-widget.c#L315
This means that it should be possible to manipulate the language though environment variables, but I've been unsuccessful in doing so because of my lack of knowledge.
I found the example strings in: https:/ /github. com/GNOME/ pango/blob/ master/ pango/pango- language- sample- table.h
and the string selection here: https:/ /github. com/GNOME/ gnome-font- viewer/ blob/827b338762 d45535718be637a 838a75f8c218f7d /src/sushi- font-widget. c#L315
This means that it should be possible to manipulate the language though environment variables, but I've been unsuccessful in doing so because of my lack of knowledge.