language learning vs learning

language learning and learning both are nouns.

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

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

Other hypernyms of language learning include acquisition.

language learning (noun)	learning (noun)
learning to use a language	the cognitive process of acquiring skill or knowledge
	profound scholarly knowledge