Praefectus Praetorio
R.I.P. Brother of the Quill
Second, Latin is a dead language because it is no longer spoken and therefore never changes.
But it was used in legal and government and church for over 1,000 years and forms a pinnacle of Western language. The very fact that it died as a living language means it stayed pure. The grammar and inflections from the Golden age (70 BCE to 18 CE, covering Cicero, Virgil, Horace and Livy) give us a language of purity and expression unequaled in modern , mongrel speech.
With sufficient incentives (threat of crucifixion) we should be able to get a substantial portion of the population to learn it. As for the others, the decorations along the Via Appia and other roads would be excellent entertainment
(of course, LOL)