Sorry for the awful typos... "Superiority" may have been the wrong term, "exceptionality" seems a better fit. And from here, the path towards a national agenda was open, at least in Germany. Language preservation is a different matter, done for different reasons other than brute nationalism. (Especially with the constant threat of assimilation by eastern neighbours.). On the other hand, which culture does not define itself in terms of its language? The loss of one's native language seems to me to be always a culture- and identity threatening factor.