As long as it's not just building a world to use their language with… Although both Cityspeak and the Creole seem more in line with Burgess' Nadsat than Tolkie

As long as it's not just building a world to use their language with… Although both Cityspeak and the Creole seem more in line with Burgess' Nadsat than Tolkien's Quenya/Sindarin/Khuzdul. More cant than conlang.