This is impossible for a language

[Jorge_Stolfi]

So your best logic is this Voynich text an invented language a substitution of a language or an elaborate cipher from a language.  It's suppose be to low that its not a cipher

I am pretty sure that it is a natural language, not in cipher but in a phonetic spelling.  And know what daiin means, at least part of the time.  But I still don't know the language, nor the value of the glyphs. Nor how daiin is pronounced.

All the best, --Stolfi