The vast majority of invented languages have disappeared almost as soon as they were created.While the most successful invented languages, like Esperanto and Klingon, have caught the imagination of a community of people, these languages are spoken more as a novelty than as a practical, everyday language. The fact that no invented language has ever become widely spoken seems to tell us something: it is only language that evolve naturally and slowly over time that have the power to spread, to continue, and to become part of our identity.