My high school French teacher learned to speak French over the summer before she started teaching it. The school asked her if she would teach it and she told them she didn’t speak French. She said she listened to so many French language tapes over the summer that she caught on pretty easy. When I visited France I was able to get by with my two years of HS French!
Plus she was very nice to look at.
Mine was smoking hot. I don't think half the class cared whether she spoke French or not.