A conlanger /ˈkɒnlæŋər/ is a person who invents constructed languages (aka conlangs).

Professional conlangers

Individuals who have been hired to create languages.

• Victoria Fromkin - Paku (a.k.a. Pakuni)
• Paul Frommer - Na'vi, Barsoomian
• Madhan Karky - Kiliki
• Marc Okrand - Klingon, Vulcan, Atlantean
• Matt Pearson - Thhtmaa
• David J. Peterson - Dothraki, Valyrian, Kastithanu (Castithan), L'Irathi (Irathient), Indojisnen, Sondiv, Shiväisith, Lishepus, Trigedasleng, Noalath, Inha, Munja'kin
• Wolf Wikeley - Tho Fan

Published international-auxiliary conlangers

Conlangers who have created languages intended for international communication.

• Louis de Beaufront
• Léon Bollack
• James Cooke Brown
• Louis Couturat: Ido language
• George Boeree
• Alexander Gode
• Ján Herkeľ
• Lancelot Hogben
• Alex G. Igbineweka
• Otto Jespersen
• Francis Lodwick:^[1] Common Writing
• Juraj Križanić
• Matija Majar
• Vojtěch Merunka
• Jackson Moore
• Charles Kay Ogden
• Giuseppe Peano: Latino sine flexione
• Kenneth L. Pike
• Waldemar Rosenberger
• Johann Martin Schleyer: Volapük
• Kenneth Searight: Sona
• Jan van Steenbergen
• Edgar de Wahl: Interlingue
• John Wilkins:^[1] unnamed universal language
• L. L. Zamenhof: Esperanto

Published fictional conlangers

Conlangers whose work has been published in books or other media that they created:

• Richard Adams: Lapine, in Watership Down
• M.A.R. Barker: Tsolyáni for Tékumel
• Hector Berlioz
• Marion Zimmer Bradley
• Anthony Burgess: Nadsat in A Clockwork Orange and a prehistoric language in Quest for Fire.
• Samuel R. Delany
• Suzette Doctolero: Enchanta from the Encantadia Saga.
• Diane Duane
• Suzette Haden Elgin: Láadan, in the Native Tongue series
• Václav Havel
• Frank Herbert
• Hergé
• Robert Jordan: The Old Tongue in The Wheel of Time
• Ursula K. Le Guin
• Barry B. Longyear
• George Orwell: Newspeak, in Nineteen Eighty-Four
• Christopher Paolini: The Ancient Language in the Inheritance Cycle (Eragon and its sequels)
• Lynne Sharon Schwartz: in The Writing on the Wall
• J. R. R. Tolkien: more than twenty languages including Quenya, Sindarin, Khuzdul; see Languages constructed by J. R. R. Tolkien
• Karen Traviss: Mando'a in the Star Wars expanded universe
• Christian Vander
• Tad Williams: Higher Singing in Tailchaser's Song
• Gene Wolfe: Ascian in The Book of the New Sun

Other notable conlangers

Conlangers whose languages are neither international auxiliary languages nor part of popular media, but are nonetheless significant among enthusiasts, have amassed a notable amount of speakers, or do not fit in other categories:

• Sonja Lang: Toki Pona, a minimalist language which has gained a large following and several publications over the years since its creation in 2001.