language vs faculty

language and faculty both are nouns.

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

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

Other hypernyms of language include mental faculty, module.

language (noun)	faculty (noun)
the mental faculty or power of vocal communication	one of the inherent cognitive or perceptual powers of the mind
the cognitive processes involved in producing and understanding linguistic communication	the body of teachers and administrators at a school
a systematic means of communicating by the use of sounds or conventional symbols
(language) communication by word of mouth
the text of a popular song or musical-comedy number
a system of words used to name things in a particular discipline