List of language creators

A language creator, sometimes referred to as a conlanger (/ˈkɒnlæŋər/), is a person who invents constructed languages (or "conlangs").

Professional language creators

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, Chakobsa, Suh Ankripton, Ts'íts'àsh, Aazh Naamori, Ravkan, Fjerdan, Shu, Zemeni, Méníshè, Kastithanu (Castithan), L'Irathi (Irathient), Indojisnen, Sondiv, Shiväisith, Lishepus, Trigedasleng, Noalath, Inha, Munja'kin
Jessie Peterson - Chakobsa, Suh Ankripton, Ts'íts'àsh, Aazh Naamori, Ravkan, Shu, Zemeni, Méníshè
John H. G. Scott - Baldung (for Archive 81)
Britton Watkins - Yautja (for Predator: Badlands)
Wolf Wikeley - Tho Fan

Individuals who have created languages intended for international communication.

Individuals who have created zonal auxiliary languages intended to facilitate communication speakers of a certain group of closely related languages.

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

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

1 2 Okrent, Arika (2009). In the land of invented languages : Esperanto rock stars, Klingon poets, Loglan lovers, and the mad dreamers who tried to build a perfect language (1st ed.). New York: Spiegel & Grau. ISBN 978-0-385-52788-0. OCLC 321034148.