The survival of Brahui, a Dravidian language, spoken even today by large numbers of people in Baluchistan and the adjoining areas in Afghanistan and Iran, is an important factor in the identification of the Indus Civilization as Dravidian. Brahui belongs linguistically to the North Dravidian group with several shared innovations with Kurukh and Malto; no dialectal features connect it with the South or Central Dravidian languages. Hence Parpola concludes that Brahui represents the remnants of the Dravidian language spoken in the area by the descendants of the Harappan population.
Indo-Aryan languages have been spoken in the area once occupied by the Indus civilisation and gradually all over North India since at least 1000 B.C. It is natural to assume that they were spoken there even earlier. Speakers of Hindi, Bengali and other Neo-Indo-Aryan languages especially have been prone to interpret the Indus texts as Sanskrit (understood in the broad sense of Old Indo-Aryan), from which their own mother tongues have evolved.
But Sanskrit was never a part of Indus civilization, vedic religion was no way close. Aryan invasion has been proven and approved by many historians except some historians or writers who are from Hindi belt.
