I’m not an expert on the history of Latin’s usage in the Mass, but I’d imagine that you’re on track there.
Lead Me Home:
You seem to be under the impression that the Church keeps the text of the Mass secret or that the common man cannot understand the EF Mass or the OF Mass when said in Latin.
I’m happy to report that this is a mistaken belief. Happily, the Mass is understandable by all. How is this possible?
Well, fortunately, the Mass IS in the vernacular (vulga, as you called it). All you need to do is get a missal. A missal is a booklet containing the text of the Mass, an explanation of the Mass, and sometimes certain prayers that are good to say before, during, and after Mass.
A missal has the Latin text of the Mass on the left page and its vernacular translation on the right page. They also contain handy directions that tell those unfamiliar with the Mass when to kneel, sit, stand, etc. It also tells you what the priest is doing and why he is doing it.
These missals can take the form of small booklets that are distributed before most EF Masses (at least the ones in my area), or you can purchase one online at a very reasonable price.
This is the average, inexpensive missal that I began with when i first started attending the EF.
aquinasandmore.com/index.cfm/title/Latin-English-Tridentine-Booklet-Missal/FuseAction/store.ItemDetails/SKU/19262/
Luckily, I recently found my late grandmother’s “Blessed Be God” missal from 1925, and I now use that!
