Phonetic notation experiment

[Jagaimo]

While this experiment is easier because we know the language it is written in and the languages you speak from your profile (making language x easy to guess), I do feel that your overall point stands. Someone should have found a convincing and repeatable solution to Voynich if simple substitution was the case. But Koen showed quite clearly on his YouTube channel that a simple cypher solution is not going to be the answer, at least not for a meaningful text. So something more sophisticated must be going on, or we might just be studying a medieval hoax.