Reminds me of a story a friend told me when I was living in South America.

My friend was walking home late at night and a guy from another country (forgot which, but it was obvious from his accent) asked him for money. This exchange of course happened in Spanish:

“I have an iron” “what does iron means in your country?” “by iron I mean knife” and pulls out a knife “oh, because here iron means this” and pulls out a gun.

Then the robber just ran away.