FEAR. Could be fear could be cultural differences. Do they have insurance, can they speak english. Do they have other support. Are they citizens or do they fear deportation. Lots of reasons that many women foreign or not that do not report abuse. Mistake for love and think it won't happen again. Think that they deserve the abuse or they brought it on. Get help. No abuse is alright and help is needed.
Shame. Different cultures different attitudes about counseling. That's part of the reason. However if I were to pinpoint the predominant reason why some refuse to go see a counselor who come from other countries, it is because of feelings of deep shame. My colleagues may or may not agree with me on this. I hopethey offer their input on this as well. It's an extremely important topic.