Thesis advisor: Margaret Thomas / This research paper aims to compare fictional languages, in particular those created in works of science fiction, to natural languages. After an introduction to conlangs in general, and to Quenya, Klingon, Dothraki and Na’vi specifically, Greenberg’s linguistic universals will be used to test their resemblance to natural languages, and suggest a taxonomy of fictional languages. / Thesis (MA) — Boston College, 2016. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Linguistics.