Australian language vs Aboriginal Australian language

Australian language and Aboriginal Australian language both are nouns.

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

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

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

Other synonyms of Australian language include Aboriginal Australian, Australian.

Australian language (noun)	Aboriginal Australian language (noun)
the Austronesian languages spoken by Australian aborigines	the Austronesian languages spoken by Australian aborigines