Have we ruled out simple substitution unwisely?

[RadioFM]

Here are some higher order [character] conditional entropies, standard EVA + character groupings Stolfi mentioned in this thread. Whitespace included. Herbal VMS typically has a lower [character] conditional entropy than natural languages, at least 1st order conditional entropy. At higher orders (3rd and above) the VMS seems to catch up or even raises a little bit above, though my numbers could be off so take it w/ a grain of salt.