Language is the ability to be understood. It’s simply part of being a group.
Blacks developed Ebonics because they don’t want anyone else to understand them.
Mommy Professor speaks Greek and Latin for that same reason. If a peasant like you or I were to speak Greek and Latin, Mommy Professor would speak English.
If Mommy Professor and us peasants spoke the same language they’d soon end up getting thrown out of their influential positions.
In a nutshell; the reason why Mommy Professor speaks Latin is to make small-minded people look big.