No Swearing in the Workplace

My job mainly consists of calling many different money transfer companies all over the world in order to put together a report about product offerings for the client. Well, the other day I'm calling an agent of a company in the UK that deals with sending money to East Africa to confirm their location; I ask what the name of the store is and he replies, "Al Karat". After I hang up, I ask my Moroccan co-worker what Al Karat means in Arabic and she laughs, "It's a bad word. It's the plural of shit." This guy cursed me off and I didn't even know it!