OP..
I don't think the average person would be able to tell the difference. Let the average person tell it, all ppl from that part of the world look the same.
Bangladesh, India, Sri Lanka, Pakistan, etc. It's all the same to ppl who are unaware and uninformed.
Asians the same thing. Even with Black ppl, you already know that we all judged as monoliths in mind, body and soul.
The only way a person will know where a person is from is if said person ask a person where he or she is from.
How many ppl willing to do that?