Italian language vs Italian

Italian language and Italian both are nouns.

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

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

Italian language (noun)	Italian (noun)
the Romance language spoken in Italy	the Romance language spoken in Italy
	a native or inhabitant of Italy

Italian language (adjective)	Italian (adjective)
	of or pertaining to or characteristic of Italy or its people or culture or language