The Viet-Muong database contains the Proto-Viet-Muong reconstruction (PROTO, linked to the Austro-Asiatic database), and fields for: Vietnamese proper (VIET), a Muong dialect recorded by Sokolovskaya (ANNG), two Nguon dialects (NCL, NYT), Thomon (THM), Phong (PHO), Arem (AREM), Proto-Ruc (PRRU), three varieties of Ruc (RUCR - Ruc according to the Russian field records, RUCL - Ruc according to Lo'i and RNTF - Ruc according to Ferlus), Thavung-So (SO), Thavung (THA), Khaphong (KHA) and Tum (TUM).