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Quinoa orginated in Africa but has also been used in South America. It is not native to Asia and so I would say that there is no Indian name for the same. You could ask for it by its english name in the superfood stores and see if they have heard about it. I would say that metro cities should have them now since they have become popular in the past couple of years.
The closest to a nontrue grain like Quinoa would be Ragi (finger millet).
I hope this helps.