A group of guys I know took a trip to France and decided to attend Mass in a small town, even though none of them understood French. They managed to stand, kneel, and sit when the rest of the congregation did, so it wouldn’t be obvious they were tourists. At one point, the priest spoke and the man sitting next to them stood up, so they got up too. The entire congregation broke into hearty laughter.
After the service they approached the priest, who spoke English, and asked him what had been so funny. The priest said he had announced a birth in the parish and asked the father to stand up.