Dialogue language

[Berethos]

It really makes no sense to me personally how they made that connection.

"Pray" in instances similar to what we see in-game comes from how it was used to emphasize requests...usually the earnest nature of said request (follow the word itself back far enough and it leads you to the Latin word for entreat).

These days it's more often used in a more sarcastic manner.

But yeah, that's where the connection comes from and why it's used here in place of please.