- American and British English have some differences in grammar, spelling, vocabulary, and idioms. However, they are still very similar languages. - There are a few key differences in grammar between the two varieties, such as verb endings and word order. - Vocabulary differs as well, with words like "apartment" versus "flat" or "pants" versus "trousers". - Spelling of some words also takes different forms, like "color" versus "colour" or "center" versus "centre".