Zulu vs Zulu language

Zulu and Zulu language both are nouns.

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

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

Zulu and Zulu language: a Bantu language of considerable literary importance in southeastern Africa

Zulu (noun)	Zulu language (noun)
a Bantu language of considerable literary importance in southeastern Africa	a Bantu language of considerable literary importance in southeastern Africa
a community of Negroid people in eastern South Africa
a member of the tall Negroid people of eastern South Africa; some live in KwaZulu-Natal under the traditional clan system but many now work in the cities