I try to not to brazenly repeat someone else's post, but I'll make an exception in this case because it's such an amusing (and sharp-eyed) find and more people should see it (and I think by giving full credit it's OK).
On the HUC-JIR Library blog Needle in the Bookstacks, Phil Miller submitted a post called Is Jozefów Close to Chelm?.
He was taking a look at the 1835 edition of Ramchal's Mesilas Yesharim published in Jozefów and he noticed what first appeared to be gibberish in Latin letters on the title page: MYRUZSJ SEŁYSM. It took a minute, but he realized that the type had been set from right to left (like Hebrew) and should have read MSYŁES JSZURYM, that is, Mesilas Yesharim (in Polish). Why? Who knows. Maybe the typesetter was so immersed in right-to-left mode that he just made a mistake, or conceivably he didn't even realize that Polish is written from left-to-right.
By way of comparison, here are some other editions from a similar time period: