My native tongue is English but I wonder why since it wasn't a British person who discovered America. It was an Italian therefore I believe the official language of the U.S. should've been and should be Italian.
The first humans to establish permanent residence in the Western Hemisphere were Paleo-Indians. The native people who were living in the area that is now the United States when the European conquerors arrived spoke a variety of languages--dozens if not hundreds--which seem to fall into two language families. The Na-Dene family is spoken primarily west of the Rocky Mountans. In this century, linguists have discovered clues that appear to link it to a language in Siberia, spoken by a tribe whose DNA is most closely related to theirs.
Italy was not yet a nation in Columbus's time; he was Genoese and his name in the Genoese language is Christoffa Corombo. It was latinized to Christophorus Columbus, and then we anglicized it to Christopher Columbus. But he sailed under the Spanish flag in the service of the King and Queen of Spain, so it was a Spanish expedition that landed on Hispaniola. In Spanish he's known as Cristóbal Colón.
It was the Spanish who established the first colony in what is now the USA. Flórida--Spanish for "flowery" in honor of Easter--is the oldest place name in our country. However, when the the United States was established as a nation in 1776, the thirteen original states that comprised it were all British colonies where English was the vernacular language. Florida did not become a state until 1845.
The Dutch had established some outposts, most notably New Amsterdam, after the English had landed at Plymouth Rock and founded Jamestown, but by the time of the American Revolution the Dutch presence was gone and New Amsterdam had become New York.
So there is plenty of historical validity for English being the vernacular language of America.
There is no "official" language in the United States: no Act of Congress has established one and it's not mentioned in the Constitution. The business of Congress and the White House is conducted in English and the Federal courts are all run in English. This is as close as English comes to being "official." Many government documents are distributed in multiple languages. Regardless of how one feels about immigrants, there are millions of foreign tourists, diplomats, businessfolk, scholars and contractors who, as a practical matter, need to know what's going on.
The State of Hawaii has two official languages: English and Hawaiian. I wouldn't be surprised if other states have taken similar actions, especially now with the strong anti-immigrant sentiments from the Redneck Right. Louisiana was originally a French colony and the Cajun French dialect is still widely spoken there as a
de facto quasi-official language. My home state of California is arguably the most cosmopolitan, and there are signs in more than a dozen languages, from Armenian to Vietnamese.
More than 90% of our population speak English well enough to be called fluent. Spanish is a distant second, with only 10%, the vast majority of whom also speak English. Businesses, who have to care more about accommodating customers than placating political factions, often post signs in Spanish and/or Chinese, which in my very un-scholarly observation is probably America's third language. To be prepared for anything, I have studied both Spanish and Chinese.
Most of the people who don't speak English fluently are recent immigrants from all over the world. Certainly that includes Latin Americans, but we have a huge number from Southeast Asia, since Perestroika there has been a steady stream from the former Soviet Union, including the Ukraine and Georgia, and there is now a growing population of first-generation Africans.