The document discusses dialects of English, American English, and English as a world language. It notes that dialects differ in pronunciation, vocabulary and grammar. Received Pronunciation is emphasized in the UK while General American is more common in North America. American English is closer to Shakespearean English than modern British English in some respects. English is widely spoken globally and functions as a lingua franca due to the historical influence and spread of British and American cultures. Approximately 375 million speak English natively while over one billion have some competence in the language.