Yes , I do
Harappan language was used by the citizens of one of the oldest civilization in the world ( Harappan civilization or Indus Valley Civilization, ).
This civilization mostly resided in Indus River all the way to the Ghaggar-Hakra river , it passed through current Indian and Pakistan territory. Because of this, I believe that the language that Indian people used today is the fruit of the development of Harrapan language that indus civilization people used in the past.