Even if language was a primary factor, it's ridiculous to think that it's better to risk your life than learn another language. But language isn't a primary factor, because people are coming here who don't speak English. In many cases, they speak French, which happens to be widely spoken in many parts of Africa. But generally they speak tribal languages, whatever Somalis speak, or perhaps Persian.
Language isn't answering the question, it's sidestepping it.