during the arrival of rice agriculture in Indochina , but notes that the origin of Proto - Austroasiatic itself is older than that date .
Paul Sidwell ( 2018 ) considers the Austroasiatic language family to have rapidly diversified around 4,000 years B.P.
during the arrival of rice agriculture in Indochina , but notes that the origin of Austroasiatic - Austroasiatic itself is older than that date .
Paul Sidwell ( 2018 ) considers the Austroasiatic language family to have rapidly diversified around 4,000 years B.P.