Hello.
A lot of sources speculate, that maybe, origin of this manuscript is Georgian.
I don't think so.
Why?
Because I'm Georgian and I don't see any similarities neither in writing style, possible grammar and by means of illustration.
If you want to check by yourself, here is huge PDF - 154mb, it has samples of almost all kinds of Georgian texts, from early 9th century to 19th century:
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(Please note, imagery is not given is not sorted by years, first it is sorted by subject - religious, literature, scientific, and thenĀ - years).
I don't see any similarities with Voynich script at all. From my point of vision, Voyinich fonts looks more like maybe cyrilic/greek origin, then Georgian or Armenian (which have similarities in glyphs, but totally different in spelling and reading).
And just have look at this book. It is same origin as Voynich manuscript is believed to be (herbia/medical/science and almost same era) and it depicts certain natural event. Can you guess it without google?