There are many bilingual and multicultural people in the world today. For many, the choices of which language they use, and how they use it, correspond to what social or cultural community they belong to. Amy Tan, a Chinese American novelist, portrays this well in her short essay "Mother Tongue." Tan grew up in two vastly different worlds, using different "Englishes." The first world, which consists of her close family, she speaks what we may call "broken" or "limited" English. The second world, which is her business and professional world, Tan speaks and writes perfect standard and academic English. Having to "shuttle" between these two communities with very different languages has had many different positive and negative effects on Tan, and many other multicultural Americans who deal with similar things. I myself speak different "Englishes" as I move back and forth between my family and society.

Tan never...