Irish language vs Erse language

Irish language and Erse language both are nouns.

Word	Noun	Adjective	Verb	Adverb
Irish language	Yes	No	No	No
Erse language	Yes	No	No	No

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

Irish language: the Celtic language of Ireland
Erse language: any of several related languages of the Celts in Ireland and Scotland

Other hypernyms of Irish language include Erse, Gaelic, Gaelic language, Goidelic, Goidelic language.

Irish language (noun)	Erse language (noun)
the Celtic language of Ireland	any of several related languages of the Celts in Ireland and Scotland