Quechuan language vs Kechua language

Quechuan language and Kechua language both are nouns.

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

As nouns, Quechuan language and Kechua language are synonyms defined as:

Quechuan language and Kechua language: the language of the Quechua which was spoken by the Incas

Other synonyms of Quechuan language include Kechua, Kechuan, Kechuan language, Quechua, Quechua language, Quechuan.

Quechuan language (noun)	Kechua language (noun)
the language of the Quechua which was spoken by the Incas	the language of the Quechua which was spoken by the Incas