Dakota vs Dakota language

Dakota and Dakota language both are nouns.

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

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

Dakota (noun)	Dakota language (noun)
the Siouan language spoken by the Dakota	the Siouan language spoken by the Dakota
the area of the states of North Dakota and South Dakota
a member of the Siouan people of the northern Mississippi valley; commonly called the Sioux