I've found the author of Voynich manuscript. He was Giovanni Aurispa.

[Koen G]

I'm sorry, but this is a kind of solution we often see. No wonder: Voynichese is so constricted, so people often intuit that they can only turn it into language if they introduce some freedom and variability.

The problem here is that as soon as this degree of freedom is allowed, the amount of possible translations for a page increases exponentially. For example, if we allow only two possible readings per word for a page of a hundred words, the number of possible solutions for that one page is two to the power of 100, which is 1 nonillion 267 octillion 650 septillion 600 sextillion 228 quintillion 229 quadrillion 401 trillion 496 billion 703 million 205 thousand 376. I.e. a very large number.