My mother in law (from China) n my husband had a huge fight and she left the house today morning and still have not return. She also switch off her phone. She is 70 and only speaks Mandarin. Husband heck care. I dont know what to do. Should I go to the police?

Even though she is 70, is she independent? If she is, she should be to find her way back? Lodging a report with the police would certainly get them to help keep a lookout but there is no guarantee. Question is what were they fighting about and if it can be prevented from recurring to avoid another MIA situation. All issues can be settled, relationships mean the most.