I once tried to read some long essay where the author had replaced all instances of "he"/"she" with some weird made up gender neutral pronoun "xe" or something

I once tried to read some long essay where the author had replaced all instances of "he"/"she" with some weird made up gender neutral pronoun "xe" or something like it. It wasn't explained anywhere and I was very confused for a few minutes. It felt really weird and unnatural and detracted from the main point. Testified to the fact that years later I have no memory of what the essay was about but still remember this.