Quechua vs Quechuan language

Quechua and Quechuan language both are nouns.

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

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

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

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

Quechua (noun)	Quechuan language (noun)
the language of the Quechua which was spoken by the Incas	the language of the Quechua which was spoken by the Incas
a community of South American Indians in Peru who were formerly the ruling class of the Incan Empire
a member of a South American Indian people in Peru who were formerly the ruling class of the Inca empire