With more than 50 regional dialects in Britain alone, this accent map proves how tricky understanding English can be. Know your Cockney from your Geordie?

English is one of the most widely spoken languages in the world: approximately 360 to 400 million people speak it natively, while another 470 million to more than one billion claim English as a second language.

But not all of these speakers necessarily understand each other. With more than 50 regional dialects in Great Britain alone, Expedia’s accent map proves just how tricky understanding English can be.

How would you fare travelling around the British Isles? Do you know your Cockney from your Geordie? Take the quiz to find out.