Web 2.0 - is it truly global?

The next generation of internet applications is discussed widely - in friends networks, in business networks, for enterprises - but this collaboration does not seem to be truly global...
Wikipedia is mainly English speaking, other networks also are mainly in English and otherwise country-specific...so where are the good examples of truly global networks and maybe even collaborative networks? Which are the aspects which make a global web 2.0 environment successful - still looking for good practises and samples!!!