Those people obviously, they didn't get used to converse in English. Their parents speak to them using their respective mother tongue. When they enter elementary and secondary school, again they speak languages other than English with their friends. In university, they hardly speak English as well, perhaps only when confronting lecturers, they do speak a tad amount of English. So, how could you expect someone who didn't speak much English for almost 2 decades, able to converse English in a proper or even near to perfection way?
Their parents probably had their education completed until primary level, or the parents did not see the importance of English back then, or perhaps, their parents weren't/aren't an English teacher.
Those people, I could see, they actually tried hard to speak English. I have to admit I am one of those who does not able to speak perfect English. I am trying to improve and I believe those people are trying hard as I am, or probably more.
When we speak English, and you hear something unpleasant to you, do not critics at the back. Keep in mind that everything has space for improvement. Who knows one day, we may outshine you. ;)
