This is an historical analysis of English Only programs in California and their impact on bilingualism as a natural acquisition process. Factors that propagate bilingualism such as a continual flow of Spanish speaking immigrants, and social, economic and ethnic isolation, are delineated for theorizing about key aspects of multilingualism, the persistence of Spanish/English bilingualism and cultural nuances of language behaviors as a foundation for cross-cultural understanding. Since the turn of the 20th century there has been a strong shift from Spanish as the official language of law and policy to English in the State of California. The most widely used language other than English has been Spanish. At the beginning of the 21st century it has been projected that Spanish speaking Latinos in the State of California will constitute 43% of the States' population by 2020. This analysis will posit a reconceptualizing of bilingualism for the States' Spanish language speakers and a redefinition of a multinational and global cultural identity that transcends boundaries of nationalistic constructs imposed historically.