The vowel exchange "a" to "o"

[Jorge_Stolfi]

Given the grammatical and figurative systems in the manuscript, what linguistic direction do you consider conceivable?

My best guess is that it is any one of the many East Asian languages where most "words" are just one syllable long.  They include all the 50 or so "dialects" of Chinese, and also Vietnamese, Thai, Khmer (Cambodian), Lao, Burmese, and Tibetan, and probably several other minor ones. 

This theory was first proposed in the late late 1900s by linguist and voynichologist Jacques Guy (one of the designers of the EVA transcription system).  He changed his mind soon after, but then I found more evidence that supported that theory.  And my conviction has only gotten stronger since then.

All the best, --stolfi