Constructed languages (conlangs) are those that are artificially constructed, rather than naturally developed.

Constructed languages (conlangs) are languages not developed by natural processes, but instead have an invented grammar, vocabulary, and phonology.

Constructed languages have been developed for a variety of purposes, including:

  • Nationality transcendence and political neutrality (Esperanto)
  • Use in fiction (Quenya, Klingon)
  • The amusement of the inventor

Esperanto is one of the most popular constructed languages, possibly having up to 2 million speakers worldwide. source

Language Learning Stack Exchange is not the right place to ask questions about the history, features or constructions of conlangs; for such questions, please visit Constructed Languages Stack Exchange.