Crowd breaker: Translator

Randomly choose two people from the group and get them to stand in the front.

Without warning, tell one of the two that they now only speak a foreign language which no one in the group understands e.g. Ancient Chinese. The other is told that they are the translator. 

For the next ten minutes, the foreigner must "speak" their language pausing just long enough for the translator to translate what they are saying for the rest of the group.

Depending one how much heart the two put into this exercise, the end results can be hilariousness.