Actually, he did.I'm sure Vrancic never lectured anyone on the subject or pretened to be something he clearly wasn't.
Dictionarivm Qvinqve Nobilissimarvm Evropæ Lingvarvm
Latinæ, Italicæ, Germanicæ, Dalmaticæ & Vngaricæ
Rječnik pet najuglednijih europskih jezika
Published in Venezia in the year 1595.
Who is pretending to be something? Maybe you should take a look in the mirror...