ISO 639-3: tcb
||35 (1997 G. Holton). 3 in Healy Lake dialect, 32 in Mansfield-Ketchumstuck. Ethnic population: 120 (1997 G. Holton).
||East Alaska, near Upper Tanana, Tanacross, Healy Lake, Dot Lake, Tok.
United States of America, Alaska and Hawaii
||Healy Lake, Mansfield-Ketchumstuck. Little dialect variation. Mansfield-Ketchumstuck is the most important politically and numerically. Most similar to Upper Tanana [tau], but they have different tone systems.
||Na-Dene, Nuclear Na-Dene, Athapaskan-Eyak, Athapaskan, Tanana-Upper Kuskokwim, Tanana
||Only between older adults in the home. Also use English or Upper Tanana [tau].
||Recognized as a distinct language in the 1970s. Tonal. Nearly extinct.