Can't Review Courses from Missing Category

The Toki Pona constructed language category was removed a while back, making it so that you can’t review all words from that category. Instead, you have to search for the course and review each course individually. This issue was brought up here: Course not appearing on dashboard, and one course was moved to another category. Can all the Toki Pona courses be moved to the same category so that they can be reviewed? Or can the category just be brought back?