My wife and in-laws immigrated from Korea in the 70's. Even though Korean is her milk tongue, her english is much better.

My in-laws both speak workable english.

Here's what a great country we live in. In 30 years, they went from picking onions in LA to owning a small business (convenience store, what else?) and retiring in comfort. They live pretty simply, but they have enough. My Father in law was a ROK Marine in Viet Nam, a taxi driver in Seoul, assistant to an OB-GYN and who knows what else. He had to quit school at around fourth grade to support the family when his father gambled the farm away.