Similarly to philosophical languages, artlangs are created in accordance with an initially defined principle in mind.
By analogy with the word "conlang", the term conworld is used to describe these worlds, inhabited by fictional constructed cultures.
Prominent examples of works featuring fictional languages include the Middle-earth and Star Trek universes, Simlish in The Sims, games like Ico and the Ar Tonelico series, and songs of the French band Magma, singing in Kobaïan.
An example is Verdurian, the language of Mark Rosenfelder's Verduria on the planet of Almea.
Alternative languages, or altlangs, speculate on an alternate history and try to reconstruct how a family of natural languages would have evolved if things had been different, e.g.: What if Greek civilization had gone on to thrive without a Roman Empire, leaving Greek and not Latin to develop several modern descendants?
Although technically a professional fictional language, Wenja, used in the video game Far Cry Primal is an attempt an reconstructing an earlier stage of Proto-Indo-European, before the appearance of characteristics such as gender, ablaut or the s-mobile, to name a few.
Talossan, from R. Ben Madison's Kingdom of Talossa, is an archetypal example of a micronational language.
Javant Biarujia, the creator of Taneraic, described his personal language (which he terms a hermetic language) thus: "a private pact negotiated between the world at large and the world within me; public words simply could not guarantee me the private expression I sought.
It was created by Canadian linguist and translator Sonja Lang[13] for the purpose of simplifying thoughts and communication.