Because they look quite similar, Poland finds it easy to impersonate Switzerland and occasionally pretends to be him at meetings.
Poland even mimics the way he talks and rants about the price of things and saving money and generally takes the mick out of Switzerland.
Sometimes he pushes Switzerland’s characterization a bit far and skips around chanting ‘Zurich Rule! Zurich Rule! I have the world’s money capital but won’t buy a mansion with a pool!’
But not one of the other countries ever realizes that it is Poland and instead think that it is just Switzerland going crazy because the price of milk went up again.