Should English be declared the official language of the United States?

Que? I think so... English should be declared as the official language of the United States. With English being popular in the United States, why shouldn't it be it declared as the official language? Communication would be easier and reliable. English is already taught in schools to the young. You can have a second language but you have to at least know how to speak basic English. There should be a law that you must know how to speak English. They would have to test you on how well you can speak basic English. If you pass, you pass, If you fail, then you would have to take classes to learn how to speak basic English. However, English isn't just the main language of the United States. The second largest language in the United States is Spanish, coming from Mexico.  Spanish should also be another official language. It's kinda like China having two types of languages; Mandarin and Cantonese. If you know at least one of the languages, you should be set.