An artistic language (commonly called artlang) is a constructed language designed for aesthetic pleasure. Unlike engineered languages or auxiliary languages, artistic languages usually have irregular grammar systems, much like natural languages. Many are designed within the context of fictional worlds, such as J. R. R. Tolkien's Middle-earth. Others represent fictional minority languages in a world not patently different from the real world, or have no particular fictional background attached.
There are several different schools of artlang construction. The most prominent is the naturalist
school, which seeks to imitate the complexity and historicity of
natural languages. Others do not attempt to imitate the natural
evolution of languages, but follow a more abstract style.