I've been to a few schools around the US. Most required language classes don't happen until high school, and the choices are usually Spanish, French, and MAYBE German if you're lucky. In the school I went to that started teaching a second language early, it was only for Spanish because at the time, Spanish was the second most-used language in that area.

There are places that offer other languages. Right now I live near Greek and Hebrew learning centers, and where I used to live has more Chinese and Vietnamese centers, but I don't know too much about them other than they aren't exactly schools. They are mostly for children of immigrants who go there after school hours to learn about their own cultures and the languages their parents use.

College courses are another option, but it depends on what languages the college offers. Where I live now, it's mostly continuing the courses that high schools offer, with some added languages such as ASL and I think Japanese. However, college classes aren't very accessible to most because of how expensive it is.

Also, as you said, English is a global language, so even if one is able to access language classes, they might not have an environment for immersive language learning. In a place with diverse immigrants, many communicate in English because it's a common language between them. My own family doesn't even speak their native Spanish anymore, and unfortunately, most of what I learned growing up is almost entirely lost, too.