(I changed my mind he probably eouldn't know french if he learned French then why didn't he try to learn any other language? I mean as the demon king he probably had to learn a lot of things so-)
"Please just hear me out. You'll be able to go back to your family after this. . . I just need a translator so that I can understand what these women are saying. . . It's okay if you still don't want to be my translator though. . ."