It's true that in England they speak English and that in America we speak English too.
But there are quite a few terms and expressions you might want to understand ahead of time.
Maybe practice up a little on your family and friends, especially with some of the wide variety of cuss words and insults.
This word is an exclamation of surprise. It means "Really? Wow! Amazing!"
"Bloody" is one of the most popular and useful swear words in England. You can say "bloody hell" when you mean "oh shit." Or "bloody marvellous" or "bloody awful" or "bloody" just about anything. It's a bloody handy little word.
This word comes from a word that is definitely not nice. I will not go into it here. People say "bugger it" when they're sick and tired of something; "bugger off" to tell someone to get lost; "lucky bugger" when something good happens to someone else; or "we're buggered" when their team is losing.