Identify the following short story or novel.
I read the book in the 1990s in the German language. Very likely the book was published one or more decades earlier, a typical softcover Heyne or Bastei-Lübbe sci-fi anthology or novel. Unfortunately, thousands of these publications exist, so this does not help much in narrowing things down. It stands to reason the original story was written by a mainstream, prolific author even earlier, and that I read a translation.
I remember almost nothing about the subgenre or plot. Setting is a simulacrum of Christian Hell, inhabited mostly by humans and a few other fantastic creatures, as corporeal beings living in a functioning society in an eternal afterlife. People use Hebrew as lingua franca, newcomers learn the language.
The protagonist is an office worker or bureaucrat. In Hell, paper cannot be produced, so people write on parchment. The non-human creatures are sentient but are prohibited from speaking to humans by a curse. A Jesus doppelgänger wearing opaque sunglasses is mentioned. At the end of the story, the geology of Hell is upheaved.