American English, sometimes called United States English or U.S. English, is the set of varieties of the English language native to the United States. Currently, American English is the most influential form of English worldwide.
English is the most widely spoken language in the United States and is the de facto common language used by the federal and state governments, to the extent that all laws and compulsory education presume English as the primary language. English is explicitly given official status by 32 of the 50 state governments. While the local courts in some divisions of the United States grant equivalent status to both English and another language—for example, English and Spanish in Puerto Rico—under federal law, English is still the official language for any matters being referred to the United States district court for the territory.
American English varieties include many patterns of pronunciation, vocabulary, grammar, and particularly spelling that are unified nationwide but distinct from other English dialects around the world. Any American or Canadian accent perceived as free of noticeably local, ethnic, or cultural markers is popularly called “General” or “Standard” American, a fairly uniform accent continuum native to certain regions of the U.S. and associated nationally with broadcast mass media and highly educated speech. However, historical and present linguistic evidence does not support the notion of there being one single “mainstream” American accent. The sound of American English continues to evolve, with some local accents disappearing, but several larger regional accents having emerged in the 20th century.