I’m not Catholic. I don’t understand the implications of this. Why does the language matter ?
Well lets face it, Latin is not the easiest language to learn. That’s just a hunch of mine.
I am not Catholic either, but I think they changed the style of the mass also and made it less elaborate. I really do not notice much difference between the current Catholic mass in English and a standard Episcopal service.
God understands Latin no problem. Whether you understand it directly (rather then following a Latin-English missal) is of minimal importance. Most of the Mass addresses God, not you. Non-Catholics hear “Latin Mass” and think it’s all about the language. It isn’t. It’s about the liturgy (and liturgical details) that served God well for over a thousand years. Who would think to change that but Satan himself?
The Latin Mass tends to demonstrate better that Christ is present in the Eucharist; it wouldn’t be handled by “civilians” the way it is in the new Mass (the language itself is secondary to the rest). The Pope and many of the architects of the Second Vatican Council were determined to move the Church into line with Protestant denominations, so they designed a service that would resemble theirs - and at the same time introduced such concepts as non-priests handling the Eucharist, no more mention of Hell or sin, etc.. Now the Catholic churches are as empty as the Protestant ones; in my area the latter are often bought or rented by Latino evangelical groups (the “replacement Christians” as well as “replacement Americans”).
There's no need for anyone in the congregation to learn Latin; the entire text of the Mass for every day in the year is available in side-by-side translation. That's what a "missal" does. Of course, you learn bits and pieces anyway; it's part of an authentically traditional Catholic culture.
Latin itself is not very hard to learn, compared to a modern living language like German, Spanish, or (one of the worst!) English. The grammar mostly memorizing a lot of rules, which have few-to-no exceptions. (Unlike English ... if the superlative of "full" is "fullest," why isn't the superlative of "good" "goodest," or the superlative of beautiful "beautifullest"? Yeah, hard to learn ...)