"That Mass must always be celebrated in the vulgar tongue is a view that is anathema under the Council of Trent."

So what? Liturgical development did not come to a sudden halt with the Council of Trent. Currently, the standard language of the Roman Rite is whatever the vernacular is. The majority of Roman Rite Catholics have no problem with this. That you disapprove is mildly interesting, but scarcely normative.