What do you think of legal immigrants?

Who don't knwo English.I would just like to say that its not so easy just to learn English.My grandmother moved here from Ukraine and she only speaks Russian. She was in her 70's when she moved here.So hate it when eople say that if you live here you have to know Russian.She tried to learn English but the school where she was learning it closed and she didn't have the strenght to go to another school.many people just can't learn the language perfectly.