No. The connection between the Harappan language and Indian
languages is theoretical, so at best you could say that the
Harappan language is distantly related to the languages spoken in
India, but this is only a possibility.
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No inscriptions have been found that are bilingual, so linguists
can not compare another language to that of the Harappan, and
therefore it has been impossible to crack.
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The Harappan language was an Indus valley language.
2. They spoke a form of Sanskrit, according to a recent
decipherment.