If I understand correctly, Catholics believe the Pope's words to be infallible only when he pronounces the ex cathedra.
My question though: how do we know when he says it's ex cathedra that it's not the fallible pope saying it.
If I understood correctly, the Church had no choice but to turn from the Latin to the vernacular to stop the bleeding to the Protestant Churches and other religions.
The Pope is only infallible when he speaks Ex Cathedra (from the Chair). It is generally only used to settle arcane debates on doctrine, that have gone on for centuries. I believe the last time it was used was to promulgate the Dogma of the Assumption of Mary by Pius XII in the early 50s.
The device of Infallibility is relatively new, put in by Pius IX in the middle 1800s to promulgate the Dogma of the Immaculate Conception.. and many orthodox Catholic view it as a misappropriation of the prerogative of Councils of the Church to establish important new doctrine.
And Latin in the Universal Language of the RCC. It is embedded in the traditions and liturgy of the Church, and quite frankly it is far more dignified, reverent and beautiful than the vernacular. There were other changes to the focus and structure of the Mass that were surreptitiously slipped into the Novus Ordo, that radically changed the experience of the Mass.
Many, myself included, described this as a Protestantization of the liturgy. I'm not sure going back to the traditional will call back people who are deliberately moving to other denominations or belief systems. But i think it could bring back people who are bored to tears by the new Mass and have simply stopped going to church.