why the voynich ist celtic

[Stefan Wirtz_2]

I'm just curious, where does that text come from? Any link? I ask because there are a lot of orthography errors in the italian text and I wonder why.

I had to type the text by hand, and as I am German, my editor made some autocorrections into "German" after typing, i.e. several changes to capital letters, 
dei -> die etc. 
I did not get all of them out.
It is Toresella's text from the article, I can't get those typos out of this anymore.