Could the Voynich Manuscript be a private educational system?

[ololololo]

At that time, there were no unexplored peoples in Europe that we did not know about. All, say, the Alpine "Indians" had disappeared by the beginning of the Middle Ages, long before VMS was written.

Well... Surely not "uncivilized" tribes, like those that still exist in the Amazon. Or even tribes with wildly different customs.  But the You are not allowed to view links. Register or Login to view. of Northern Italy are a small Germanic-speaking "tribe" that was formed around 1300 CE in an Alpine valley and have kept their own distinctive language to the present day.  

In Italy there is also a small region where people speak a You are not allowed to view links. Register or Login to view.. The community was formed in the 1400s or maybe earlier.

The You are not allowed to view links. Register or Login to view. suddenly went extinct when the last speaker was blown to bits in June 10, 1898, in an island on the coast of Croatia.  (I we ask an AI artist to create a portrait of that poor guy, will it have spots?)

All the best, --stolfi

Quite interesting examples... But the question is the same - why did the author need his own writing system?
However, one can recall Danielian script developed for the Armenian language. This writing system could not fully capture vowel sounds, which is why it was rejected. Maybe Voynichese is a similar example of unsuccessful writing?