well to start with, suddenly everything is in another language, from transport to food, from school to daily living. That is a massive change to any one. Would they be shy and won't open their mouth or would they stand up and communicate?
2ndly, they are the foreigners this time, depends of the places they are going to, different race people would be there, the world they would be in is just so so so different, The street would look different, the building would be different, the way people dress would be different, Even the toilets would be different, Would they conform to the change or keep being who they used to be?
你应给多加分噶!