language barrier vs barrier

language barrier and barrier both are nouns.

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

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

language barrier: barrier to communication resulting from speaking different languages
barrier: any condition that makes it difficult to make progress or to achieve an objective

Other hypernyms of language barrier include roadblock.

language barrier (noun)	barrier (noun)
barrier to communication resulting from speaking different languages	a structure or object that impedes free movement
	any condition that makes it difficult to make progress or to achieve an objective
	anything serving to maintain separation by obstructing vision or access