<human>:  What's the difference between American and British English?
<bot>: The main difference between American and British English is the pronunciation and spelling of some words, as well as minor grammatical differences. American English tends to be more simplified and uses fewer forms, while British English tends to be more complex and uses more verb forms. For example, American English sometimes uses the same word for many different tenses, while British English sometimes requires a different word to express each tense. Additionally, word choice differences can create nuances in meaning between the two versions of English.