Barbar kruger uses graphic imagery and graphic typesetting to create her artworks. I consider them art, because she strives to have a balance sometimes between imagery and text but it is all very conceptual. I mean, do you want to look at a barbara kruger art piece hanging in your house every day?
a good example of language in a work of art is renee magrittes
Leci N'est pas une pipe
(This is not a pipe)
It is at the Menil Colection in Houston TX