1. The language called Krai'Ahd is a constructed pidgin-ish tongue used to help AKB and Duenicallo1 communicate with the Shaokennah, because Shaokennah language contains sounds that the other two species can't even hear, let alone say. So Krai'Ahd is an extremely simplified version of the Shaokennah language.
2. The Yahgahn culture's sacred language, Yahgahnii, was constructed back during that culture's early days. It is a musical language, and was in fact designed to be sung.
3. A third language exists, the name of which I have forgotten. That one was constructed as an extremely precise scientific language, using operational language. It lacks any form of the words "be" or "is," and any translation into English would sound like hyper-Spock, because the idea was inspired by Operationalism, E-Prime, the Copenhagen Interpretation, and related things.
Though the only one of these languages I have any words for is my conlang Trai'Pahg'Nan'Nog.
So I was wondering if anyone else has works of fiction - theirs or otherwise - in which conlangs feature.
1 = There are three sophont species that evolved on Traipah: The humanoid Ah'Koi Bahnis, the saurian Shaokennah, and the four-legged predatory Duenicallo. (Duenicallo can stand upright, and walk upright, but can only run on all fours.)