I agree with you Flavia, but chances are that english would never be replaced, at least by the spanish language. Mandarin? Mmhm of course China's in an ongoing work that causes rapidness to its development. It is changing so fastly that makes you dizzy, I think. As clear as it shows itself, and as a consequence, China's language would be in greater number as the Country achieves its objectives [being the #1 potence in the world] and it is natural. But at this moment, english still is in the position they have been so far. And I agree when Flavia says that Mandarin is a difficult language to learn. Taking it from this viewpoint, we see that English, even if China is declared as the 1# potence, will still remain in its place.