Cebuano language vs Cebuan language

Cebuano language and Cebuan language both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cebuano language	Yes	No	No	No
Cebuan language	Yes	No	No	No

As nouns, Cebuano language and Cebuan language are synonyms defined as:

Cebuano language and Cebuan language: language of the people of Cebu in the Philippines; its lexicon contributes to the official language of the Philippines

Other synonyms of Cebuano language include Cebuan, Cebuano.

Cebuano language (noun)	Cebuan language (noun)
language of the people of Cebu in the Philippines; its lexicon contributes to the official language of the Philippines	language of the people of Cebu in the Philippines; its lexicon contributes to the official language of the Philippines