Never assume in a foreign country that all the people around you don't know your language. A friend quoted two funny events that happened with his friends in Hamburg:
Once they went to the stadium to watch a hockey match of Pakistan. After the match they entered the field among others. Now to get out, they chose a short-cut that involved jumping over the advertisement boards. They saw a girl trying to jump over the boards and one of them exclaimed "help her guys". At that came the voice of her father from the side "tum log yahan aa kar tou badal jaya karo" (you people should change at least when you live here) :D
Similarly, they were once standing on train station waiting for the train. A woman, seemingly arab, was also standing with her child there. Another european woman was eating a burger near them. The child was crying and speaking to her mother in a foreign language. The woman eating the burger guessed it and gave her burger to the child. At that one of them exlaimed "what a spoiled child it is". His mother turned to them and said "apnay hon gay tou pata chalay ga" (you'll know when you'll have your own).