The U.S. Census Bureau Language Statistics API returns data with the languages spoken at home and the ability to speak English for the population 5 years and over, from 2009-2013. The tables are include nation, the 50 states, plus Washington, D.C. and Puerto Rico, counties with 100,000 or more total population and 25,000 or more speakers of languages other than English and Spanish, and core-based statistical areas.
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