Well, some of the rankings may change depending on if it counts only by native language. If it does, I think Spanish goes in before English, otherwise English is second, I think, but I think I'll go with native language in mine, so population ranking knowledge helps ^.^. Mandarin, Spanish, English, Arabic, Hindi, Portuguese, Bengali, Russian, Japanese, German. Of course, if it's not native language, then there's probably a fair amount of the second half that are off