Constructed language
human language whose phonology, grammar, and vocabulary have been consciously devised for human or human-like communication
Klingon
artistic language
Belter Creole
Mini
Mirad
zonal auxiliary language
Siberian
Proto-Esperanto
Langue nouvelle
Esperanto
Lingua Franca Nova
controlled language
Glagolitic
philosophical language
planned language
High Icelandic
engineered language
Atlantean
Distributed Language Translation
Na'vi
Latino moderne
International Code of Signals
argot
Ido
Idiom Neutral
Interlingua
Volapük
musical language
experimental language
Gibson Code
Neo
Black Speech
Asa'pili
Utopian