With local shop-keepers, if they won't speak English, don't patronize them.
High School exams are in English. In some cases, they may be in Spanish for English as a second language students.
Texas fought a lawsuit on college preferences, and the anti-majority bias got hit hard with that.
It's not as bleak as you imagine.
And American culture is subverting theirs, too. I know parents that complain their kids only speak English, and not the language of the old country.
My grandkids can barely speak Cambodian. The other grandparents complain.
/johnny
If you think American Culture in America is subverting a foreign culture, we are done here.