Voynichese is a numeric cipher?

[ololololo]

Even if the image shows fire, rainbow, rabbit, the Moon, this doesn't guarantee that the label literally spells these words and not something else depending on the nature of the text.

All right. Such liberties are possible, but they do not take place, and when you write a book about medicine, you rather sign the fire as fire, because you do not need to play the reader.