Proto-Indo-European (PIE), the reconstructed proto-language for the Indo-European language family
Proto-Indo-European (PIE) is the common ancestor of the indo-european languages, spoken by the Proto-Indo-European people roughly 5700 years ago. It is not attested, but rather has been reconstructed in substantial detail using the comparative-method.
Use this tag for questions specifically about the PIE language itself and its reconstruction. For questions about the history of its descendants, use indo-european.