1. Languages of the United States

2. Main languages

3. The United States does not have a national official language, but English is the de facto national language. English American English Canadian English North American English

4. Native American languages The Native American languages predate European settlement of the New World. Most of these languages are endangered.  Navajo  Dakota  Cherokee  Western Apache  Zuni

5. African American English It is an African American variety of American English. Its pronunciation is common to Southern American English, which is spoken by many African Americans and many non-African Americans in the United States. African American English has contributed slang expressions such as cool and hip.

6. American English The term 'americanism' was first used by John Witherspoon, president of Princeton University, in 1781. American English is different from British English in terms of spelling, grammar, vocabulary, pronunciation, and slang usage.

7. Differences in orthography color for colour (AmE/BrE) center for centre traveler for traveller programme for program skilful for skillful cheque for check

8. Differences in grammar different preferences for the past forms of a few verbs: earned/learnt, burned/burnt (AmE/BrE) different prepositions and adverbs: in school/at school whether or not a definite article is used: to the hospital/to hospital; actress Elizabeth Taylor/the actress Elizabeth Taylor (AmE/BrE)