This article is from the Artificial languages FAQ, by Rick Harrison firstname.lastname@example.org with numerous contributions by others.
Mailing lists also exist to support users or developers of many
constructed languages including Ido, Loglan, Lojban, Klingon,
Tolkien's elvish languages, and many others.
The oldest English-language mailing list devoted to a variety of
artificial languages is conlang, founded in 1991 by John B Ross
and others. Recent archives are here:
And older archives are here: