Latinian language vs Latin

Latinian language and Latin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Latinian language	Yes	No	No	No
Latin	Yes	Yes	No	No

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

Latinian language (noun)	Latin (noun)
the group of languages derived from Latin	any dialect of the language of ancient Rome
	a person who is a member of those peoples whose languages derived from Latin
	an inhabitant of ancient Latium

Latinian language (adjective)	Latin (adjective)
	of or relating to the ancient Latins or the Latin language
	of or relating to the ancient region of Latium
	relating to languages derived from Latin
	relating to people or countries speaking Romance languages