Not as hard as some period cursive variants (e.g. German Sütterlin). But once you go that far back, you'd also have to emulate the language, and I don't think t

Not as hard as some period cursive variants (e.g. German Sütterlin). But once you go that far back, you'd also have to emulate the language, and I don't think that most GMs are a) up to that and b) willing to inflict this upon their players. Some fake Shakespearean might do, of course… One could scour the net for a handwritten font that looks slightly arabic, considering where the Mythos' most famous madman came from… Back in the days, I had some Postscript document that actually included some font, based on Edsger Dijkstra's handwriting. Given that PS is a full-fledge programming language, too, that could be the basis for some crazy per-letter randomization. (Although I bet TeX/MetaFont wizards could do something similar, and there might even be some OpenType fonts with enough glyph variants out there already)