Are you saying I'm less of a Catholic because I attend an english-speaking Mass?
You said it didn't matter how Mass was said, but what was preached, to determine what a man believes.
I argue that a man who prays sloppily will believe sloppily. So it does matter how Mass is said.
And this has nothing to do with language, but everything to do with what is said and how those saying it go about doing it.
For example, taking Holy Communion in the hand as opposed to on the tongue will perforce make a number of determinations about ones beliefs concerning this Most August Sacrament.