I live in a non-english speaking country. One time, a immigrant student didn't know the word for fire cracker, so they looked it up on a dictionary. That's good, but the word cracker has two meanings. They used the one that means the edible thing, not the one that is fired to the sky. The question was to name something that is an explosive. The words for cracker (the edible one) and cracker (fire works) are nothing similar in my language, so I spent quite a while wondering what the student meant.