I'm not Catholic, so what's so special about Latin? How about some reformers go really old school and start preaching in Aramaic. And what does that say about your church if people would rather attend if they can't understand what the leader is saying?
Back when Mass was said in Latin, everyone had Missals (books) that had the Latin on one page and the English (or whatever the local language was) on the page facing it so that you always knew what the priest was saying. You mostly needed to only know the responses, as far as speaking it was concerned, though, the chants and songs at High Mass were in Latin. They were usually easy to learn, and after a few years hearing them, you knew them by heart anyway.
Mass in Latin was one thing that made the Church truly Universal, because you could go anywhere in the world, attend Mass and know what was being said. Now, you can get the gist of it because you know the parts of the Mass, but you don't know all of it.