The Proto-Mon–Khmer language (Proto-Austroasiatic) is the reconstructed ancestor of the Mon–Khmer languages, a purported primary branch of the Austroasiatic language family. However, Mon–Khmer as a taxon has been abandoned in recent classifications, making Proto-Mon–Khmer synonymous with Proto-Austroasiatic; the Munda languages, which are not well documented, and have been restructured through external language contact, have not been included in the reconstructions.