Language may be used as the medium or integral element of the work, for example, a poem, or title.
Language is often used to inform an audience of the intent, meaning, and value of a work of art.
Language is used to analyse, discuss, and critique a work of art.
The artist's and critic's words associated with art may not be consistent with the experience of it.
Explaining art belies its fundamental nature which is to experience it, and in this, we like it, or we do not.