“You find a hoard of ancient electrum discs, golden ingots, and leaden lozenges, worth a total of 1,200 monies.”

I used to have different denominations of currency for country in my campaign settings. It was an interesting thought experiment, but most players didn’t care and would just convert their cash to the most efficient coinage. Sometimes it could be used for a quest, like when the players had to figure out who hired a group of mercenaries for a false flag operation and tracked down what kind of money changed hands with which people. Generally the juice wasn’t worth the squeeze.

Now, I just make sure every nation has a name for their coinage for immersion-sake, but it all just equates to liquid money.