Many languages in the United States are used, or historically have been used. Over 500 languages are spoken at various levels by the U.S. population. The most commonly used language is English (specifically American English), which is the de facto national language of the United States. Since the 1965 Immigration Act, Spanish is the second most common language in the country. The state government of Louisiana offers services and documents in French, as does New Mexico in Spanish. 

There are many languages indigenous to North America or to U.S. states or holdings in the Pacific region. Hawaiian, although having few native speakers, is an official language along with English at the state level in Hawaii. Alaska recognizes twenty Native languages as official. 

According to the American Community Survey 2016, endorsed by the United States Census Bureau, the languages spoken at home with over 100,000 (in millions) speakers older than five are: 

While modern estimates indicate that American Sign Language was signed by as many as 500,000 Americans, as of 1972—the last official survey, closer estimates range around 100,000 as of 2011. (Although various cultural factors, such as passage of the Americans with Disabilities Act, have resulted in far greater educational opportunities for deaf children, which could double or triple the number of current ASL users.).
Other than English, what language is official in Hawaii
Hawaiian