Tai Loi, also known as Mong Lue, refers to various Palaungic languages spoken mainly in Burma, with a few hundred in Laos and some also in China.
Hall (2017) reports that Tai Loi is a cover term meaning 'mountain Tai' in Shan, and refers to various Angkuic, Waic, and Western Palaungic languages rather than a single language or branch.
The Shan exonym Tai Loi can refer to: Additionally, Ethnologue (21st edition),[2] citing Schliesinger (2003), lists Doi as a Tai Loi variety in Ban Muang, Sing District, Luang Namtha Province, Laos as a nearly extinct language variety spoken by an ethnic group comprising 600 people and 80 households as of 2003.
Schliesinger (2003) reports that elderly Doi speakers can understand the Samtao language.
[4] The Muak Sa-aak variety of Tai Loi shares 42% lexical similarity with U of China; 40% with Pang Pung Plang; and 25% with standard Wa.