It takes languages across the racial boundaries that migration theories uphold and places them on par with other cultural affinities (like art or religion), which are not limited by race. The linguistic divide between Aryan and Dravidian, as that between the Indo-European and other language groups is also now being questioned.
A greater Nostratic family of languages has been proposed that includes Indo-European, Dravidian and Semitic languages and looks for a common ancestor for all three. This requires a greater degree of contact between these groups which remote Central Asia cannot afford. Moreover, there are affinities between Sanskrit and the Munda or aboriginal languages of India, as S. Kalyanaraman has noted, that indicate a long and early contact, if not common evolution, which could have only happened in India.