ANSWER: Hindi
                                                                            
Explanation: 
The U.S. Census Bureau based on American Community Survey data collected from 2009 to 2013, said that more than 60 million people in the U.S. speak a language other than English at home and that Hindi was the top Indian  language spoken with nearly 6.5 lakh speakers. Top languages other than English spoken in the U.S. homes include Spanish, Chinese, French, Korean, German, Vietnamese, Arabic, Tagalog  and Russian.