According to Professor Shinde Harappan Civilization Not Developed By Aryan

Archaeological excavations of  Rakhigarhi started from 2015 under the leadership of Vasant Shinde, Professor of Deccan College of Archeology, Pune. Shinde's team found 4500 year old male skeletons. His DNA sample was first sent to the Birbal Institute of Paleobotany. 

Professor Shinde, conducted a scientific assessment of archaeological and DNA tests have found that the people who developed the Harappan civilization were not the Aryans but the people of the Indian subcontinent. The people of the Harappan period were in the Vedic period. 

There were also traces of Harappan civilization on the banks of river Saraswati. Professor Shinde also says that no signs of conflict were found in the Aryan Dravidian civilization, Mohenjodaro and Harappan civilization were developed by the people of the Indian subcontinent. People from here went to trade and farming in Iran and Central Asia. 

This has led to different claims between historians and archaeologists on this matter. Genetic scientist Davis Rick Harvard University also acknowledged this. Farming also started here. No outsiders of any kind came in large numbers. Yes, we do not know about the origin of language.