Latin. The Ebonics of the 19th century.
Latin was still offered when I started HS in 1969 and I now regret not taking it (took French to be around the cute girls instead). Of course, the Latin teacher was the same one teaching the course when my mother took it in 1939 when it was a required course. Given that she went into nursing, it worked out well for her.
I would have failed that entry exam miserably.