Afrihili 
Balaybalan 
Blissymbols 
Brithenig 
Dutton World Speedwords 
Efate-group-based Artificial Language 
Eskayan 
Esperantic 
Interglossa 
Interlingua (International Auxiliary Language Association) 
Interlingue 
Interlingue (Occidental) 
Interslavic zonal constructed language 
Klingon 
Kotava 
Láadan 
Ladakhi Sign 
Lingua Franca Nova 
Lojban 
Neo (Artificial Language) 
N'Ko 
Novial 
Palawa Kani 
Quenya 
Rennellese Sign Language 
Romanova 
Sindarin 
Talossan 
Toki Pona 
Volapük 
Glottolog