Proto-Palaungic is the reconstructed proto-language of the Palaungic languages of mainland Southeast Asia.
[1] Paul Sidwell (2015) suggests that the Urheimat (homeland) of Proto-Palaungic was in what is now the border region of Laos and Sipsongpanna in Yunnan, China.
Sidwell (2014) suggests that the word for 'water' (Proto-Palaungic *ʔoːm), which Gérard Diffloth had used as one of the defining lexical innovations for his Northern Mon-Khmer branch, was likely borrowed from Palaungic into Khmuic.
The following list of Proto-Palaungic reconstructions, organized by semantic category, is from Sidwell (2015: 100-111).
Sidwell (2015:112-113) lists the following Proto-Palaungic forms as having diffused from Palaungic into Khmuic.