As the most spoken conlang, Esperanto has been used in a variety of circumstances, from regular conversation to original songs and films. Other conlangs, such as Klingon, Naʼvi, or Láadan, were created specifically for fiction. There are also special-purpose conlangs, such as Interslavic, which one can use to communicate with speakers of any Slavic language without them having to learn Interslavic too.
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