dispensing with compound consonants (usually replaced by single
  consonants, for example, puta for putra, son). Some Prakritisms are found
  not only in the Rigveda but also in Mitanni speech: for the Sanskrit ashva
  (horse), Mitanni has assu, and for the Sanskrit sapta (seven), it has satta.
  Such simplification must have helped to spread Indo-Aryan speech among
  ordinary people, for Rigvedic Sanskrit, like the later Sanskrit, evidently
  remained a language of the few. By the sixth century BC, it was the Prakrit
  language of each region that the people understood; and so it was in the
  Prakrit of Magadha that Lord Mahavira and Gautama Buddha delivered
  their sermons. So, if Indo-Aryan speech was spread predominantly by way
  of ‘elite dominance’, the people still had a share in determining its popular
  form, namely, Prakrit.
Comparitive Developments in Mesopotamia and Indus Region On the
basis of what we know from historical records about the Mitanni from a
slightly later period, 1500-1300 BC, we may well draw a picture of what could
have happened in the Indus basin. There, in upper Mesopotamia, the Indo-
Aryan speakers of the Mitanni kingdom consisted of rulers, warriors,
charioteers, horse-trainers and, perhaps, priests. Yet, a vast majority of the
population of the kingdom continued to speak the Hurrian language, which
did not even belong to the Indo-European family. The Mitanni ruler Tushratta
(Dasharatha in Sanskrit) himself wrote to the Egyptian pharaoh, 1400 BC, a
letter in Hurrian in 500 lines. This clearly gives us the picture of continuous
bilingualism. But since Hurrian, being a written language, was strongly
entrenched, the Indo-Aryan speech there remained an elite language only for
some time and then entirely disappeared. In the Indus basin, however, with
the disappearance of the Indus script (and, presumably, of the official
language that was written in it), there was no such strong rival facing Indo-
Aryan. Indeed, there might have been only several small ‘substrate’
languages. Some of them were probably Dravidian, to judge from the
appearance of some Dravidian words in the Rigveda.
Dravidian Family
Major Constituents The Dravidian            languages form the second largest