How do I locate a Russian lawyer for a child abuse case?

My daughter’s mother has custody of her and has remarried. I believe her new husband may be abusing my daughter. She is disabled and can’t speak for herself, but her behavior is totally different when she comes to my house and ever since her mother remarried and the new husband moved in. My daughter seems scared when I try to change her clothes or bathe her, and this is something I’ve done regularly her entire life. She’s never been scared before. She also gets upset when it’s time to go back to her mother’s house. How do I find a lawyer who can figure out whether there is any abuse at her mother’s house and if there is, how do I prove this if my daughter can’t tell anyone what is happening to her? I want a lawyer who speaks Russian as that is my first language and it is easier for me to communicate in Russian.