Annoyed

Is it wrong that I'm incredibly annoyed by the fact that I had to stop a great game of Monopoly at school today because the kids I was playing with wouldn't stop talking to each other in Spanish? I tried to explain to them while it was great that they are bilingual, it's not appropriate to speak in Spanish when you are around other people that don't understand the language. I repeatedly asked them to please speak in English and they kept slipping back into Spanish so I stopped the game. Was that wrong of me?