American English is the most widely heard dialect of English because the United States is where many TV shows, movies, and music are made. However, millions of people speak British English. Australian and New Zealand English are also very common dialects, as is South African English. In terms of sheer numbers of speakers, Indian English and Pakistani English are very widespread. While people who speak different English dialects can usually mostly understand each other, they might have to be careful not to use too many idioms.