Kechua language vs Indian

Kechua language and Indian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kechua language	Yes	No	No	No
Indian	Yes	Yes	No	No

As nouns, Indian is a hypernym of Kechua language; that is, Indian is a word with a broader meaning than Kechua language:

Kechua language (noun)	Indian (noun)
the language of the Quechua which was spoken by the Incas	any of the languages spoken by Amerindians
	a native or inhabitant of India

Kechua language (adjective)	Indian (adjective)
	of or relating to or characteristic of India or the East Indies or their peoples or languages or cultures
	of or pertaining to Native Americans or their culture or languages