This is just so wrong in so many ways..........well at least 8, anyway :)
We only usually have Spanish and English here and not too many Spanish speakers. I had one girl in my class whose Dad could speak a little English, but her mom spoke Spanish only. T tried for a while to have my notes done in Spanish, but it was very time consuming. It was hard for the girl to get things reinforced at home because the vowels to the mom were aw, ay, ee, oh, oo so that's what she taught her daughter. The dad was not home much and they didn't have a phone for a LONG time. I had to stop by if I wanted to communicate sometimes. I tried to set an appointment for a parent-teachers' conference one time and it took me an hour before the mom understood what was being said. But later in the year it got better as the mom would show up (and once in a while the dad) to get more information about things. The girl was one of my favorite students ever. She LOVED to learn. She always came and said, "I'm having a great day!" By the end of the year, she went from not knowing English to being able to read on a mid first grade level (not quite grade level, but close) and being able to write. Her dad and mom (not illegal aliens by the way) ended up moving back to Mexico the following year.
I taught English to foreigners for a few years. English is not that easy to learn. The Vietnamese generally tried harder, actually a lot of the students really tried hard. But when you get older, you don't have as much linguistic talent. Nonetheless, many had succeeded and most didn't expect many favors. The Bosnians I had did at the time. They were required to attend English class, but often didn't come. They expected their teacher to sign their attendance forms that they had come and threw a hissy fit when we wouldn't.
The second generation of immigrants often does speak the language. I have seen a ton of them who speak English to their parents.
In my time in Korea, I saw many, many, many foreigners and Americans (most of them residents). Of all the ones I saw, maybe only a few tried to learn about the Korean language and culture. Most expected and looked for Koreans who spoke English to help them out. I see it a lot here too with Spanish speakers sometimes.