Years ago a missionary in Indonesia wanted his worker to cut the grass. However, he kept telling the man to get a hair cut. (Rambut means hair, and rumput means grass.) After three hair cuts and a nearly bald head, the error was detected.
Another blooper from Indonesia is the frequent misuse of the words kalapa and kapala. Kalapa means coconut and kapala means head. Though it is quite okay to drink coconut juice, it is not good to request head juice at a restaurant! —Christine