There is a Wikipedia entry on this topic as well as another video at the Voice of America that give more information on the topic if you're interested. Still, the English and the American varieties of English have much more in common than they do not.
All around the world, people from different cultures take part in the ritual called dating.British people and American people can always understand each other – but there are a few notable differences between British English and American English Grammar Americans use the present perfect tense less than speakers of British English and a British teacher might mark wrong some things that an American teacher would say are correct.There are British words which many Americans will not understand and vice versa.For instance, American English omits the “u” in colour, neighbour, honour, etc. First, it is more common to use the single quotation mark in British English, whereas in American English it is more common to use the double quotation mark.Most people also know that a lot of words mean different things: a boot is the trunk of your car, a jumper is a sweater, and thongs are flip-flops. There are also a couple of verbs that are irregular in American English that are regular in British English, including dive, fit, and wet. Second, in American English, people include punctuation inside quotation marks, while in British English the punctuation goes outside of the quotation marks (unless it’s part of the quote.) For instance: BE: ‘She went to the park’, said John. BE: John said, ‘She went to the park.’ (this is part of the quote so it stays inside the quotation marks) AE: John said, “She went to the park.” Then, of course, there are the multitude of words that are used differently in each dialect, along with a few different phrases. In terms of past-time adverbs such as yet, just, or already, Brits usually use the present perfect verb tense and Americans use the past simple verb tense. Where Brits will say “have got,” Americans will typically say “have.” Like this: BE: I’ve got to go now.