Voynichese is a numeric cipher?

[oshfdk]

Could you feed your cipher description to a coding agent and make it create an encoder, that would convert plaintext to ciphertext? If you check that it works correctly, I can encode some text using this encoder and you can check how quickly you can read it. I would say that if reading a single sentence takes more than a couple minutes even after some practice, then this cipher looks impractical for a book. Not that anything would prevent the creator of the manuscript from using an impractical cipher, but I tend to think that for a book of this size some more or less efficient solution would be used. Not many people like wasting their time.