We don't want to take the U.K. route, I think, in all things. A controversial policy in the United Kingdom is to impose a minimum language standard for spouses. I heard testimony: language, language, language. Do we want to go that route?
On the other hand, practically speaking, it's called the Internet. Are these people prevented from accessing the Internet? If not, simple video streaming in the languages of the cultural communities at a known Internet spot can inform. Not all people, some will be locked up in chains, the usual horror stories, but that's a practical, low-cost alternative.