Apparently, we DO need an official language. In order to be NATURALIZED in this country, you have to be conversant in English...
Not to a very high degree, and there is NO requirement to speak English at all to be a natural born citizen, nor is there any requirement to maintain any degree or incremental improvement in English. Otherwise, we would have thrown Jitler out long ago. There IS however, a requirement on the part of the government to provide due process and equal protection under the law, as well as to ensure equal voting rights. Then there's the First Amendment and all that stuff about freedom of speech and all. Well, you get the idea.