Ryukyuan language vs Ryukyuan

Ryukyuan language and Ryukyuan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ryukyuan language	Yes	No	No	No
Ryukyuan	Yes	No	No	No

As nouns, Ryukyuan language and Ryukyuan are synonyms defined as:

Ryukyuan language and Ryukyuan: the language (related to Japanese) that is spoken by the people of the Ryukyu Islands

Ryukyuan language (noun)	Ryukyuan (noun)
the language (related to Japanese) that is spoken by the people of the Ryukyu Islands	the language (related to Japanese) that is spoken by the people of the Ryukyu Islands
	a member of the Japanese people living on the Ryukyu Islands southwest of Japan