Fiat Lingua is the Journal of the Language Creation Society. The following articles contain third-party scolarship about conlangs
Review of Hildegard of Bingen’s Unknown Language: An Edition, Translation and Discussion
From Elvish to Klingon: Exploring Invented Languages, A Review
An interview with David J. Peterson and Sai Emrys about Dothraki and the Language Creation Society
Concerning the Book Living Language Dothraki and the Dothraki Language with a Response from the Khal
Reviews of The Art of Language Invention and The Interpreter’s Tale
Constructed Language: An Analysis of the Phonemic Sounds Influenced by Historical Stereotyping