Americans speak a lot of languages. Using individual-level census data, we found the most commonly spoken language at home other than English and Spanish in each state and Washington, D.C. German, French, and Vietnamese are common in several states. Visit Business Insider's homepage for more stories. Americans speak a ton of languages, and this map shows which languages other than English and Spanish are the most common in each state and Washington, D.C. The US Census Bureau's American Community Survey annually asks more than 1 million Americans questions about their lives, families, and backgrounds. One question asks respondents what...