Sort of a funhouse-mirror reflection of "A Canticle for Leibovitz".
The entire BOOK is written in the sort of English that might have developed (or devolved) a couple hundred years after a devastating nuclear war.
Good book, but it was a lot of work.
“Riddley Walker by Russell Hoban”
I read that and loved it. “The heart of the wood’s in the heart of the stone”? Something like that.
Another of the few books I’ll probably read again.