What is the difference between American English and British English?

American English is used in the US, while British English is used in the UK. The main differences between American English and British English relate to:

  • Spelling (e.g., “defense or defence,” “fulfil or fulfill,” “favorite or favourite”)
  • Punctuation (e.g., use of the Oxford comma, use of dashes)
  • Grammar (e.g., use of plural or singular verbs with collective nouns)
  • Word choice (e.g., “elevator or lift,” “period or full stop”)

There are also many differences in pronunciation and colloquial language that are not relevant in the context of formal writing.