Actually Latin was expected by the council fathers to remain the dominant language of the Mass. It was definitely expected to remain the language of the entire canon of the Mass. AFTER the council a committee took over the job of writing the rubrics for the New Mass. That committee and circumstances essentially ushered the whole Mass into the vernacular.
What a disaster.
I know many older Catholics feel something was lost, but I don’t think I get it. What is to be gained by conducting Mass in a dead language, especially as the Latin is a translation itself?
What is bad about the vernacular?
Although it would be decades before it could ever happen, English is now the universal language (lingua franca) that latin used to be, and could be the easiest way to have uniformity within the universal Church.
But there are benefits to using the dead latin language, the most obvious being that as a dead langauge, it won’t evolve and “scholars” can’t pretend that black means white - as they so often do in English.
An immediate benefit in the USA would be if the novus ordo was celebrated everywhere as VII ensisioned it - in latin.
Then parishes would not need to have spanish and english masses. Everyone would join to worship in the neutral language of the Church. It would be a real unifying experience.
It would take much catechesis, but it would be quite do-able. If there’s a will, there’s a way.