sara, you do fine with English. As good as many native speakers.

Sorry about your friend. The pattern is that the abused become abusers. That is a shame but that is the pattern.

There is a way out but your friend needs to want to change. No one can make someone change if they do not want to. A therapist could help, especially one specializing in abuse.

If this is too big a step, here are some articles you might send to your friend and see if she really reaches out to them.
Psych Central - Search results for Anger management

Best wishes to you.