This is factually incorrect.  The normative Ordinary Form is celebrated in Latin, with an option for the vernacular if there are pastoral benefits to this, and an obligation for pastors to teach the people the Latin, especially the parts where they make their responses.

Of course, after the Council, things went off the rails a bit and many places went vernacular-only.  But "is to be celebrated in the vernacular" is a bit much.

The permission for celebration in the vernacular is the least significant difference between the Ordinary and Extraordinary form.  Why dwell on it?  (And why call the EF "The Latin Mass" any longer?)