Modern catholics and protestants are the exception in regards to "understanding" their rites. For centuries religions have maintained "sacred languages" or at t

Modern catholics and protestants are the exception in regards to "understanding" their rites. For centuries religions have maintained "sacred languages" or at the very least sacred dialects, with the intention of emphasizing continuity between generations. Also, you don't really seem to understand how the Latin Mass works. The Ordo is repeated the same way every mass, so anyone that remotely cares knows what it says. The proper, including the readings, changes most days, but many are repeated throughout the year, like the mass of the virgins, and also repeats every year in the exact same way, so there's no reason for a concerned faithful not to buy a book with them if they care so much. Readings are frequently read in vernacular before the sermon, if pertinent, but they are not core to the mass so there's not much reason to care