Translation of Mutternschlüssel

We drove towards the university where he studied and from there we drove to the hospital where he worked. He told me that there were hospitals for locals and for foreigners with different medical equipment and staff.
Sometimes this is an outcome of personal problems or incidents. For example, there could be a crime commited by someone of a certain origin. The consequence could be that the victims would blame an entire community.
At around eight in the evening we were back, took a hot shower and met our friends for a fancy dinner. They were leaving the country the next day and we would stay there another three days.