You are missing the point.
The important factor is the semantic re-basement, the terms used for the powers of ten can vary over time and geography.
The human instinct to hoard collectibles has driven the adoption of Bitcoin. For this to continue to be a strong driving factor, the amounts that typical new users are able to acquire should be referred to as full "bitcoins". At this point anything from 1 to 100,000 satoshis would work, but the smaller units scale farther into the future, if we assume further S-curve adoption.
Lakh is just a good term to refer to units of 100,000 of anything, because it is a simple single syllable term, and is already familiar to many people.
I think Mega is more familiar to people. Lakh is just familiar to Asian people and not an international term, that is used by everybody, who has a computer.
So, stop forcing terms into the bitcoin world, just because it is used in your country. I don't care, what population your country has, so you can say "it is already familiar to many people"
It is not gonna happen.