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Think you’re a well-mannered person? Most people do. And so they might be, at home. But the most apparently harmless gestures and customs – the thumbs-up sign, a casual greeting, certain types of gifts – can be radically misconstrued on foreign soil, with embarrassing or even dangerous consequences. Just remember: never shake hands with a Ukrainian in a doorway and never ever make the OK sign to a Greek.

Don’t say we didn’t warn you. Here’s our essential guide to all sorts of unintended ways to offend your foreign friends.