Aboriginal Australian language vs Australian

Aboriginal Australian language and Australian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Aboriginal Australian language	Yes	No	No	No
Australian	Yes	Yes	No	No

As nouns, Aboriginal Australian language and Australian are synonyms defined as:

Aboriginal Australian language and Australian: the Austronesian languages spoken by Australian aborigines

Other synonyms of Aboriginal Australian language include Aboriginal Australian, Australian language.

Aboriginal Australian language (noun)	Australian (noun)
the Austronesian languages spoken by Australian aborigines	the Austronesian languages spoken by Australian aborigines
	a native or inhabitant of Australia

Aboriginal Australian language (adjective)	Australian (adjective)
	of or relating to or characteristic of Australia or its inhabitants or its languages