This is not happening just in your city. There are countries where entire villages are populated by immigrants from the same countries and even the maior is one of them. Spain is a good example.

What I don't understand is how can you live in a foreign country and not want to learn at least the street language, to be able to communicate at the store or with the government offices. If not, at least learn a few words of English.

Speaking of English, is it difficult to say hello back to someone on the street? I suppose it's a question of manners and education.

What is even worse, these people are never going get a job as how can they. and to spin it further, think about their kids. How they are going to grow up? What they are going to learn?