There are billions of people who speak different languages ​​(or different Englishes), but they learn standard English so they can communicate with more people. There are also many other languages ​​that approach the popularity of Standard English, so they should be just as valuable. Amy Tan's mother learned standard English to be able to communicate with the people around her: since most of the people she knew spoke standard English. When my family came to the United States, we weren't required to learn English, but it was convenient to learn it (but we could still talk to a lot of people in the United States without knowing English). 'English). The reason we learned it is the same reason Amy Tan and her mother learned it: to communicate with a wider audience. Most people learn standard English to expand the groups of people they can speak with.