Interesting and much more than I knew previously. Still, when a Roman rite Indian Catholic pops up over here the question is usually “Are you from Goa?”.
That’s probably the most likely thing, but given the urbanization and internal mobility of India, Roman-rite churches are turning up elsewhere.
We had a priest of Indian ethnicity from Sri Lanka at our parish in Oklahoma City for a while. Very nice young man, although his accent was tough even for me (I’m good with foreign Englishes). I sometimes wonder what Catholics from India or Africa make of places like Oklahoma!