> The only dead language that I can think of that was revived was Hebrew, but modern Hebrew is entirely different from that which was spoken millennia ago, and is a mixture of litigurical Hebrew, Arabic (plenty of Mizrahi influence along with the Sabra movement during the start of Israel), Russian (heavily used for mechanical terms), and German (heavily used to scientific terms).

Entirely different my ass. Modern Hebrew is closer to liturgical Hebrew than the language of Shakespeare is to that of Britney Spears. There are some areas with a great deal of borrowing of vocabulary but you could say the same thing of modern Russian or Japanese and no one would say they were “entirely different” from the language of 1800.