The study of language has always been lumped together with the arts as an academic discipline. However it is only today that I have really connected how language, specifically learning a second language is really what art is all about.
We don’t learn a second language in order to communicate or to get by in another language; though sometimes this is why people learn a language as adults. We learn a second language to discover new ways of communicating. We learn how to express thoughts and ideas in a different way and when we receive thoughts and ideas through another language those ideas are quite different.
Essentially these new avenues of expression are the function of art, to express things in ways that are outside of our everyday language, so we can see and hear things in new interesting and enjoyable ways.
Probably the closest art form to language learning is poetry. Most languages have rich poetic traditions, because everyday words are combined in new ways to express different thoughts. This is exactly what we do when using a second language. It’s like we have instant access to art by trying to express the same thought in a second language, we instantly have a subtly different version of the initial thought that can be in itself thought provoking by making us view that thought in a different way.
Everything is somehow a different world in a second language and there is of course new realms of art of writing and music to explore in that language as a speaker of that language. Strangely this art argument for learning new languages seems to be seldom used to promote language learning. It is reason enough to learn as a bonus to being able to understand more people in their native tongue.
The differences between language learning and the other arts is that use of the second language is not usually done with the intent of producing or appreciating art. There are no great works of language learning, the process is too messy to ever be considered great art. However for the individual learner this process is very much like the mental processes involved in absorbing ideas from great pieces of art.