Na-Dene languages in the context of "Lipan language"

Dene–Yeniseian (/dɪˈneɪ ˌjɛnɪˈseɪ.ən/, dih-NAY YEN-ih-SAY-ən) is a proposed language family consisting of the Yeniseian languages of central Siberia and the Na-Dene languages of northwestern North America.

Reception among experts has been somewhat favorable; thus, Dene–Yeniseian has been called "the first demonstration of a genealogical link between Old World and New World language families that meets the standards of traditional comparative-historical linguistics". Other linguistic scholars have deemed Dene–Yeniseian only as "plausible".

The genetic history of the Indigenous peoples of the Americas is divided into two distinct periods: the initial peopling of the Americas from about 20,000 to 14,000 years ago (20–14 kya), and European contact, after about 500 years ago. The first period of the genetic history of Indigenous Americans is the determinant factor for the number of genetic lineages, zygosity mutations, and founding haplotypes present in today's Indigenous American populations.

Indigenous American populations descend from and share ancestry with an Ancient East Asian lineage which diverged from other East Asian peoples prior to the Last Glacial Maximum (26–18 kya). They also received geneflow from Ancient North Eurasians, a distinct Paleolithic Siberian population with deep affinities to both "European hunter-gatherers" (e.g. Kostenki-14) and "Basal East Asians" (e.g. Tianyuan man). They later dispersed throughout the Americas after about 16,000 years ago (exceptions being the Na-Dene and Eskimo–Aleut speaking groups, which are derived partially from Siberian populations which entered the Americas at a later time).

Tlingit (English: /ˈklɪŋkɪt/ KLING-kit; Lingít Tlingit pronunciation: [ɬɪ̀nkɪ́tʰ]) is an endangered language indigenous to Southeast Alaska and Western Canada spoken by the Tlingit people that forms an independent branch of the Na-Dene language family. Although the number of speakers is declining, extensive effort is being put into revitalization programs in Southeast Alaska to revive and preserve the language.

Missionaries of the Russian Orthodox Church were the first to develop a written version of Tlingit by using the Cyrillic script. After the Alaska Purchase, Tlingit language use was suppressed by the United States government, though preservation programs were introduced beginning in the 20th century. Today, Tlingit is spoken natively by perhaps only 100 elders.

Amerind is a widely rejected higher-level language family proposed by Joseph Greenberg in 1960 and elaborated by his student Merritt Ruhlen. Greenberg proposed that all of the indigenous languages of the Americas belong to one of three language families, the previously established Eskimo–Aleut and Na–Dene, and with everything else—otherwise classified by specialists as belonging to dozens of independent families—as Amerind. Because of a large number of methodological issues with the 1987 book Language in the Americas, the relationships he proposed between these languages have been rejected by the majority of historical linguists as spurious.

The term Amerind is also occasionally used to refer broadly to the various indigenous languages of the Americas without necessarily implying that they are a genealogical group. To avoid ambiguity, the term Amerindian is often used for the latter meaning.

Athabaskan (/ˌæθəˈbæskən/ ATH-ə-BASK-ən; also spelled Athabascan, Athapaskan or Athapascan), also known as Dene (/ˈdeɪneɪ/ DAY-nay; also spelled Dené), is a large branch of the Na-Dene language family of North America, located in western North America in three areal language groups: Northern, Pacific Coast and Southern (or Apachean). Kari and Potter (2010:10) place the total territory of the 53 Athabaskan languages at 4,022,000 square kilometres (1,553,000 sq mi).

Chipewyan is spoken over the largest area of any North American native language, while Navajo is spoken by the largest number of people of any native language north of Mexico.

Navajo or Navaho (/ˈnævəhoʊ, ˈnɑːvə-/ NAV-ə-hoh, NAH-və-; Navajo: Diné bizaad [tìnépìz̥ɑ̀ːt] or Naabeehó bizaad [nɑ̀ːpèːhópìz̥ɑ̀ːt]) is a Southern Athabaskan language of the Na-Dené family, through which it is related to languages spoken across the western areas of North America. Navajo is spoken primarily in the Southwestern United States, especially in the Navajo Nation. It is one of the most widely spoken Native American languages and is the most widely spoken north of the Mexico–United States border, with almost 170,000 Americans speaking Navajo at home as of 2011.

The language has struggled to keep a healthy speaker base, although this problem has been alleviated to some extent by extensive education programs in the Navajo Nation. In World War II, speakers of the Navajo language joined the military and developed a code for sending secret messages. These code talkers' messages are widely credited with saving many lives and winning some of the most decisive battles in the war.