Yes, "Native American" is a proper adjective for indigenous peoples of America.
The proper adjective is "American," derived from the proper noun "America."
The proper adjective for Portuguese is "Portuguese."
The proper adjective for Mayan is "Mayan."
The proper adjective for Russian is "Russian."
The proper adjective for Mexican is "Mexican."
The proper adjective for Inca is Incan. An example sentence: They traveled to South America to tour the Incan ruins. In Spanish, the proper adjective is Incaico, as in Imperio Incaico (Inca Empire)
The proper adjective is American, describing the noun 'literature' as 'of America'.
The proper adjective is "American," derived from the proper noun "America."
South America is a proper noun due to it being the name of a place.
The adjective form of America is American. The word American can also be a noun (demonym).
The proper adjective for Inca is Incan. An example sentence: They traveled to South America to tour the Incan ruins. In Spanish, the proper adjective is Incaico, as in Imperio Incaico (Inca Empire)
The proper adjective for Portuguese is "Portuguese."
The proper adjective for southwest is "southwestern."
The proper adjective for Haiti is Haitian.
In English, the adjective form of the noun Argentina may be Argentinian, Argentine, or more rarely the combined form Argentinean. The most common demonym (a person) seems to be Argentine.
The proper adjective form for Navajo is Navajo, as in Navajo Nation, Navajo people, Navajo history, Navajo art, etc. An example sentence: We visited the Navajo display at the museum to see the Navajo jewelry.
Vietnamese is the proper adjective for Vietnam.