Even still, I just couldn't see Westerners trying to adapt to another language. I think it comes down to the rather stubborn/ arrogant nature. I saw this first hand at a trade convention in China. Plus English is a derivative of Latin and French, so it has roots, whereas Mandarin and Hindu are immensely different languages vocally, textually and culturally. I stress the culturally different bit because most people don't realise the significance unless they know both languages very well. I don't deny that Mandarin will become more significant in the future, but I don't think to the point where it takes precedence over English. At least, not within twenty years. Like I said before, more likely, China and India will continue adapting to English as they have been for a while now.