"I think that a living language is defined by its usage by native speakers." First, I think there are degrees of nativeness in language acquisition. Cutting ou

"I think that a living language is defined by its usage by native speakers." First, I think there are degrees of nativeness in language acquisition. Cutting out the entire class of strictly non-native speakers is a bit of an extreme step. Second, what about differences in usage of the same language over two classes of native speaker? http://en.wikipedia.org/wiki/African_American_Vernacular_English http://en.wikipedia.org/wiki/African_American_Vernacular_Eng... was once considered to be "incorrect" English.