If people in North India are called North Indian, and down South they are South Indians, what is the terminology to use for people in the middle parts of India, Middle Indians?

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If people in North India are called North Indian, and down South they are South Indians, what is the terminology to use for people in the middle parts of India, Middle Indians?

can we call it just India or the northern/southern part of India? man, I hate this when people refer to north or south like they are different countries. : r/indiadiscussion

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