I suspect the author may not answer us but I think I know how he got it:
Based on some similarity of glyphs to Latin letters and taking some liberties he could read a few initial words as a sentence in English
By the way I believe we can read it in the same vein as:
Facts move as Orloj crow
Where "Orloj" is the famous clock of Prague: You are not allowed to view links.
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Think of it - Voynich Manuscript, emperor Rudolph, Prague, zodiac signs, Sun and Moon, tempus fugit, things change as old Orloj ticks and plays its chimes.
It cannot be a coincidence