No surprise that Spanish is the most common language spoken in the US after English. But what's the further down on the list? In Illinois, Polish is third. Slate's Ben Blatt also looked at what the most common Native American, Scandinavian, Indo-Aryan and African languages are spoken across the country. UPDATE: AAPI Voices' Karthick Ramakrishnan points out flaws with some of Blatt's maps, and provides updates.