```
These haven't been updated since their addition, so this updates the
list that controls which qt base translations are bundled with the macOS
binary, to all the languages that are available with qt 5.9.8.
This could probably be improved in some way, however qt updates are
infrequent, and I didn't want to spend any more time looking at this.
Also given that no-one seems to have noticed and/or reported this it
wouldn't seem high-priority.
```
Backport of core PR19059.