There are lots of examples for British/American English.

Going camping:
"Don't forget to bring a torch." The UK people meant what the American's call a "flashlight". The Americans wondered if we were going to burn down the campsite!

Clothing for the summer:
"I just can't stand wearing pants when it is hot."
Our American friend meant she would only wear skirts, not trousers, in the summer in Turkey. All of us who were British laughed out loud, as in British English she had said she wouldn't wear her underwear.

Men's fashion:
US friend says to Phil, "Phil, I love your suspenders."
Well, Phil was wearing "braces" over his shirt to hold up his trousers (like Larry King). As a Yorkshire man he thought suspenders were what ladies used to keep up their stockings, and was offended at the affront to his manhood.

There are many, many more. I was helping my American friend in the kitchen. She asked me to hand her the pitcher from behind me. I didn't understand why she needed a picture to cook with. (We call it a jug!)