Bodies on the move: salsa, language and transnationalism

In my post on English in Berlin, I wondered what is required for a language to become ‘local’, and about the perhaps problematic tradition of defining languages on the basis of territory. Although it has been quite some time since English was primarily the language of the English people in England, the language is still called ‘English’. (Interestingly, the etymology of the term is also from ‘somewhere else’, deriving from northern Germany, and thus already has a history of being on the move.) When do Englishes become ‘native’? And if we continue to tacitly invoke concepts based on confined spaces (‘England’), whose interests remain veiled under national frameworks and are therefore invisible?