English - It Really Is More Than One Language

I am sure that everyone in the world would agree that a Swede is someone who comes from Sweden. In the UK (and many other parts of Europe and former British colonies), they would agree but also tell you that a Swede is a purple and yellow root vegetable (known as a turnip in Canada). However, in some parts of London, Swede is also a term for your head.

So, if someone says they have bashed their Swede, how am I supposed to know if they have hit a Swedish person, mashed some turnip or bumped their head?