Tłı̨chǫ lands lie east of Mackenzie River (Deh Cho) between Great Slave Lake (Tıdeè) and Great Bear Lake (Sahtu) in the Northwest Territories.

However, Tłıchǫ Yatıì has seen a decrease in mother tongue speakers, hence placing it under the list of endangered languages.

Indigenous languages were not allowed to be spoken at these schools since the late 19th century.

[9] This allowed the Tłıchǫ people to prioritize the preservation of their language, culture and way of life.

[10] Tłı̨chǫ Yatıì is one of the nine official Indigenous languages of the Northwest Territories (NWT) in Canada.

[11] According to the 2018 - 2019 Annual Report on Official Languages, multiple revitalization efforts have been made by the Tłı̨chǫ Government.

[13] The consonants of Tłıchǫ Yatıì in the standard orthography are listed below (with IPA notation in brackets)[clarification needed]:[14] Tenuis stops may be lightly voiced.

[15] Tłıchǫ Yatıì words are modified primarily by prefixes, which is unusual for an SOV language (suffixes are expected).

[16] In addition to verbs and nouns, there are pronouns, clitics of various functions, demonstratives, numerals, postpositions, adverbs, and conjunctions in Tłıchǫ.