Far be it for me to correct you; but ....The correct response is:
Intentionally written in a language that is neither legible, nor taught to anyone outside the Catholic sphere of influence. The sole intent for having priest learn latin; was to prevent the masses from reading the bible for themselves. Also, bear in mind that the Gutenberg Press was not invented until 1450; thus each Bible was hand-written and was far beyond the financial means to all but the very wealthy, or upper-level members of the clergy.
I have no problem with you giving a clearer response. Yours is, of course, the accurate answer.. I was merely being lazy. No offense taken. ;)
Ancient Greek and Latin weren't dead yet during the Patristic period. Actually, neither ever did die, they just changed into the Romance languages and Modern Greek.