Diglossia has often been noted as a factor in language shift, especially in speech communities where a minority language is in a diglossic relationship with a majority language. Fishman (1967: 36) had previously noted that
``[B]ilingualism without diglossia tends to be transitional both in terms of the linguistic repertoires of speech communities as well as in terms of the speech varieties involved per se. Without separate though complementary norms and values to establish and maintain functional separatism of the speech varieties, that language or variety which is fortunate enough to be associated with the predominant drift of social forces tends to displace the other(s)."