'academic' ... Klingon: who knows?Klingon was created by a linguist, 
Marc Okrand. He got his PhD (I have read his 1977 dissertation, 
Mutsun Grammar) from UC Berkeley. There are numerous linguistic in-jokes in Klingon. Tolkien was a professor of Anglo-Saxon at Oxford and worked on the staff of the OED, mainly on etymologies. L Zamenhof, the inventor of Esperanto, was a Russian ophthalmologist. The language in 
Quest for Fire was designed by the author (and linguist) Anthony Burgess. Not all conlangers are linguists. One of my favorite conlangs is the [url=ophthalmologist]Real Character[/url] language created by Bishop John Wilkins, a founding member of the Royal Society.