What culture is English tied to anymore, though? India, South Africa, even Asia to some degree have significant unique English vocabularies, having recombined or reapplied existing morphemes to fit local cultural contexts. Consider the Korean "officetel" (http://en.wikipedia.org/wiki/Officetel). You're not wrong to point to basic xenophobia as shaping what people do, but I think the "ownership" of English is diffuse enough now that it would take much less effort to dilute it further than coin a new language (which doesn't really happen anyway).
