There's a lot we don't know, such as why MIL has the child and why mother nor calvertc's mother does not. We don't know if calvertc has a clinical depression or is just situationally depressed. We don't know if clavertc lives near his daughter or across the country. We don't know calvertc's financial situation.
We do know that he has the right to an interpreter at all these appointments that he has, such as doctors, counselors, social services, and lawyers. Without clear communication, he can't fully get the help he needs for all these situations. Too many opportunities for misunderstandings.
Calvertc, maybe your local chapter of NAD can help you get started with an advocate who can connect you with the services that you need and are entitled to.