Although the United States does not have an official language, the most commonly used language is English (specifically, American English), which is the de facto national language, and the only one spoken at home by approximately 78% of the U.S. population. Many other languages are also spoken at home, especially Spanish (13.4% of the population), according to the American Community Survey (ACS) of the U.S. Census Bureau; these include indigenous languages and languages brought to the U.S. by people from Europe, Africa, and Asia. However, the majority of speakers of these languages are bilingual and also speak English. Although 21.6% of U.S. residents report that they speak a language other than English at home, only 8.4% speak English less than "very well." Several other languages, notabl