American is my language, differs a bit from English. In spelling, flavor/flavour, color/colour... in cars, hood/bonnet, trunk/boot... in objects, cell phone/mobile, vacuum/hoover, trash can/rubbish bin, cookies/biscuits, potato chips/crisps, French fries/chips. The pronunciations can be confusing. How they ever got 'Sin Jin' out of St. John I'll never understand.
Because of the melting pot which formed our country, many 'foreign' words are common in the American patois, east coast to west coast different names for the same thing. The first major 'foreign' settlers on the continent were Spanish, both east and west coasts, so Spanish and a lot of Spanish words are in common use as well as the names of cities, states and landmarks, San Francisco/SaintFrancis, Florida/flowers, Sierra Nevada/Snowy range... Spanish is the second most common language in the U.S..France also had its American settlers and gave us new languages like Creole.
Of course the original settlers, Native Americans had their different languages, Apache was much different than Iroquois etc.and there were hundreds if not thousands of different tribes. They developed a ingenious sign language to communicate with each other that differed little, hundreds of miles apart. There too did we get many city, state and landmark names.
It has been established that people who can speak more than one language have higher IQs and are more adaptable. Basically, when Americans say "English is our language" they are showing ignorance of the rich history of our country and, quite frankly, bigotry.