He must be going thru a mid life crisis to be thinking about learning another language to try and save his failing career.
Definitely. You can see the desperation in his posts by admitting he needs to take sudden and wild changes in direction.
But he'll fail at that too and he knows it.
he could speak fluent Spanish already.
He should move to where it is the official language. The British had many slave and plantation colonies throughout Central America in prior centuries and many Criollo still living there today have no real identity (something he admires in himself) but are in small part British along with everything else on the menu down there.
Unlike Poland, Central America is Delphia's sort of place and he'll fit right in. And if it doesn't then he can always join a migrant caravan to be with the rest of them in California.
"professional development"
LOL! You're already paid a pittance now at it is. That's because you don't provide value as things stand for you. Claiming you can teach others Spanish from what you memorized out of tourist phrase books isn't going to give you bargaining power. Seriously. It's not.