Interesting opinion today in the DT. It seems literacy is a problem for local residents also. Check out the title. LOL.

Lieracy Important for Immigrants as well as Local Residents

Link... [1]

Seriously, uneducated immigrants often have little demand of their own language, making English that much harder to learn. I see this first hand almost every day. The educated person usually does not need to leave his country to provide for his family. Our huddled masses are mostly uneducated.