15,000 (2011 SIL).
Northwest Lhuntse district: bounded by Kurichhu river east and north, Tangmachhu village south and Rudong La pass west.
The dialect around Tangmachhu is more divergent. Lexical similarity: 69% with Nyengkha [neh], 70%–73% with Bumthangkha, 66%–74% with Khengkha.
Used as L2 by Khengkha [xkf].