You did the right thing. I'm so proud of you for standing up for yourself. I was in the same situations too before (2017- Jan.2018). One of my co-workers in a nursing facility, not a hospital, always did that to me too. Other nurses make fun or laugh with my accent ONLY if this one Charge Nurse was there because she always started the bullying. One day, I was tired of her for correcting and laughing at my accent in front of co-workers (nurses) and CNAs and talked to her in private. I told her that what she's doing to me is bullying and if she will not stop it, then I will report her. She apologized to me and since then she never bully or embarrasses me again in front of my co-workers.