A family of grammars for Voynichese

[oshfdk]

SLOT 1: ch sh y
SLOT 2: eee ee e q a
SLOT 3: o
SLOT 4: iii ii i d 
SLOT 5: y p f k l r s t cth ckh cph cfh n m

Slot 4 looks interesting to me. I cannot think of a context in the manuscript where both i+ and d would appear valid, I wonder what lead to them being grouped together. Maybe this will be clarified in the per-section grammars. Since these grammars are mutually incompatible (perform poorly on other sections, as you said), probably the generic grammar is a mix of individual grammars.

Also interesting that o has its own slot. And y appears in two slots, looks like it's the only character that does this. As far as I remember, there used to be some ideas about there being two distinct y glyphs - word initial y and word ending y, that look almost the same, but function differently.

I think this work is very important for possible deciphering attempts.