What if it's a "Lossy Encoder" for 15th-Century Latin?

[ololololo]

There is no point in this procedure.
With such text, a conventional decipherer won’t be able to understand it properly.
But in reality, there is a possibility that the encryption algorithm may distort the text, and the decipherer will end up with something different from what they would have wanted to see. In the case of a book that has remained undeciphered for about 600 years, this is indeed possible...