AMERICAN INDIANS, NORTH AND SOUTH

Native American is a preferred term. 

Whenever possible use a specific group or tribal nation name. Do not use Indian as a shorthand.

Use accents on names and words if the Indigenous language is written in the Latin alphabet:

            Gwich'in, Tse Nashchii'

            (Note that the symbol for a glottal stop is the same as an opening single quote—a 6 and not a 9 in many fonts.)

For a specific group follow the spelling in Webster's or the Style Manual. For tribal plurals do not add s:

            Comanche        Aztec            Shoshone

            Cuna                  Maya            The Apache were later dispersed by the Comanche.

Some groups have a preferred tribal name, which should be used first, followed by the more common English name in parentheses. Examples: Kainai (Blood), Nakoda (Assiniboine), Aaniiih (Gros Ventre). A tribe may prefer another name because in some cases the more popularly known name was derived from an unflattering or derogatory label given to it by other tribes (sometimes meaning "enemy," such as with Apache and Comanche). This can be complicated when the U.S. official reservation or nation name is one that some consider derogatory; it's simply best to ask for preference.

For individuals, s may be added:

            three Comanches

but     a Blackfeet [in U.S. context]; a Blackfoot [in Canadian context]

            the Blackfeet nation [U.S.]; Blackfoot (Siksika Nation) [Canada]

            the Blackfeet [U.S.]

See also Amerindian, First Nations.