My wife is Hispanic and often engages in conversation with other Hispanics. She was having a garage sale this week, and she was talking with some illegals from Mexico that showed up. They are complaining that illegals El Salvador and other central America countries keep coming and coming and coming. One said she has been working in USA for 15 years and used to be able to work 7 days a week at Wendy's, but due to the new arrivals, she can only work a few hours two or three days a week.
Today, some new arrivals from El Salvador arrived at my wife's garage sale. They arrived to USA with nothing but the shirts off their backs and were hoping for some free clothing or whatever.
In any case, this doesn't seem like it is going to end well for anyone in this country in the end.
Not everyone is capable or learning a second language, especially fluently. I know many people who can’t do it. I grew up in a military family. I spent 22 years in the military. I know LOTS of people who can’t learn a second language, no matter how hard they try.