Japanese language vs Altaic

Japanese language and Altaic both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese language	Yes	No	No	No
Altaic	Yes	Yes	No	No

As nouns, Altaic is a hypernym of Japanese language; that is, Altaic is a word with a broader meaning than Japanese language:

Japanese language: the language (usually considered to be Altaic) spoken by the Japanese
Altaic: a group of related languages spoken in Asia and southeastern Europe

Other hypernyms of Japanese language include Altaic language.

Japanese language (noun)	Altaic (noun)
the language (usually considered to be Altaic) spoken by the Japanese	a group of related languages spoken in Asia and southeastern Europe
	any member of the peoples speaking a language in the Altaic language group

Japanese language (adjective)	Altaic (adjective)
	of or pertaining to or written in Altaic