Do I have to speak French at Rennes School of Business? Aloha Student Support! May 24, 2017 15:04 Updated Follow No, all the staff, students and faculty members of Rennes School of Business school speak English. Related articles Will I have French classes? Are all the classes taught in English? How important is it to speak French in France? Can I learn French after school hours? Should I learn French before coming to Rennes? Comments 0 comments Article is closed for comments.