According to modern knowledge, there is only one specimen of Satanic calligraphy in existence.
This curious extract first appeared in 1523, taken from an Italian text which describes an encounter between Ludovico Spoletano and the Devil. Spoletano allegedly summoned Satan, requesting that he use his body as a vessel to write clear and legible answers to a series of questions asked of him. However, the King of Hell refused to cooperate, and instead snatched the pen into midair so as to rapidly scrawl the answers himself.
What the Devil wrote was indecipherable: a series of diabolic scrawls that seems as though it should read from left to right. After being passed onto several learned men without success of decryption, the text disappeared into abeyance.
As of today, no one has been able to decode the text or make a convincing case for it being a hoax.
However, academics have identified traces of some of the manuscript’s characters in Amharic, a language spoken in its purity in the province of Amhara, Ethiopia. According to legend, this was the primeval language spoken in Eden.