The Asst. Pastor in his thirties at my former parish told me that he didn't know a word of Latin. I'll bet that most young priests and seminarians are incapable of praying even the Pater Noster, Ave Maria, Credo or Gloria in Latin.
I am good friends with a young man in a diocesan seminary. He is not required to take a single course of Latin or Greek. In fact he has learning disabilities and has difficulty with even basic theology, and generally is a terrible candidate for the priesthood, although a nice young man. But this is the kind of seminarian they are accepting these days.