The biggest problem of Polish translation of Dominion is that only Base, Intrigue and Cornucopia were done. At some point I'll probably have to translate the other cards, as my girlfriend liked the game, but doesn't speak English well, so with no translation there's no much room to expand our games beyond Base and Intrigue I bought recently. Jack of All Trades will definitely be hard to do. And Duchess, due to the way Duchy and Duke got translated - there's no word fitting to Duchess which would go in line with the two previous translations.
Looking through the cards from other expansions, I have one question about English "translation" of the game. Does anyone know why is Hamlet called Hamlet? I can't see the name having anything in common with card text, the picture also doesn't help.