[3] This includes conditioning of tone and morphology of phonemes, as well as frequent contractions, elisions, metatheses, and consonantal substitutions.

[3] Chipewyan is mainly endangered due to its complex structure, which makes it difficult to decipher the morphological code, as well as the fact that the majority of the speakers are in their mid-late adulthood.

[12] At the Red Cloud Indian school, there are immersion classes for children to teach the language.

[13] Dakota Wicohon is an after-school camp that helps children learn the language, since it is not taught in the government-run boarding schools for American Indian youth.

[17] Kaska was typically a First Nations speaking language, and mainly lived in northern British Columbia and some from southeast Yukon in Canada.

[18] People who speak Kaska today still live within the British Columbia and Yukon Territory area.

[22] The Potawatomi Language is critically endangered because there are only 52 fluent speakers left surrounding the Great Lakes region in Michigan.

[24] Within a decade, those who are fluent (the majority being the elderly) will soon be dead, causing the culture to die out with them, along with the knowledge of history that has been passed down from previous generations.

English has become the predominant language spoken in homes due to the halt of parents speaking Potawatomi to children from 20 to more than 50 years ago.

Tuscarora entails complex morphology dealing with the copying of words, roots, stems, and affixes.

All of the elders are around the ages of seventy to eighty years old, where a possible result is the extinction of the Tuscarora language.

With the splitting of the people into two geographical locations, they now begin to differ in terms of language usage, morphology and phonology.

A process known as glottalization is a key factor in being able to articulate certain sounds in the language, called ejective consonants.

Many languages with a large body of speakers, including Arabic and Amharic, contain these sounds, an observation which discredits this theory.