Apologies if this is an obvious question.
I have a user translating a work to French. The user reported this notification “Please contact your system administrator if you would like them to install extended French (Canada) language support for the Pressbooks interface.”
Typically I would add language using these instructions: https://guide.pressbooks.com/chapter/languages/
The book language is currently set to French, but I don’t see French under theme options.
What am I missing?
Thanks very much,