esoconlang 

Also called a cursed conlang, esoconlang or esoteric constructed language is a conlang with very unusual or counterintuitive features, typicaly intentionally made to be weird as a joke. The word esoconlang can be used to accentuate the esoteric programming language or esolang character of the conlang, whereas curselang can be used to denote conlang aspect not related to mathematical or computer linguistics.

Just like programming languages have esolangs, constructed languages have esoconlangs.
There have been many interesting esoconlangs submitted for Agma Schwa's Cursed Conlang Circus.

esoconlang by j637man February 3, 2024