The most commonly spoken dialect of English is American English. This dialect is primarily used in the United States and has distinct pronunciation, vocabulary, and grammatical differences compared to other forms of English, such as British English or Australian English. American English has been heavily influenced by various immigrant languages, regional dialects, and its own unique cultural context. It serves as a primary medium for communication in international business, entertainment, and popular culture, proliferating through various media, including films, television, and music.