Constructed languages, or conlangs, are languages that have been intentionally created rather than having naturally evolved over time. They can be designed for various purposes, such as facilitating communication, artistic expression, or experimentation with linguistic concepts. Examples include Esperanto, which aims to promote international communication, and Klingon, developed for the Star Trek franchise. These languages often have their own grammar, vocabulary, and phonetics, making them unique. Some conlangs, like Dothraki and High Valyrian, were created for fictional worlds in literature and film, enhancing the depth and realism of those universes.