My son is wanting to purchase a freddie mac home.The former owners are living in it paying rent month to month. The bank and or sellers live 60 miles from the property claiming the people are moving out. They don't speak English. Whose responsibility is it to get them out and how long does it take? Should they back out of this deal? The people don't seem like they plan to move...

They can ask, as part of the offer, ask for them to be moved out before closing.

Remember what if at moving, they take the air conditioner with them, all the light fixtures and holes in all the walls. If you buy the home before they move out, you are now a landlord and will have to evict them.

... The bank and or sellers live 60 miles from the property claiming the people are moving out. They don't speak Enlish. Whose responsibility is it to get them out and how long does it take? ...

It should be the responsibility of the bank (or whoever is selling it to your son) to evict them. As Fr_Chuck says, your son should insist that the bank do this before closing. Otherwise, it will become his headache.

As discussed in this (https://www.askmehelpdesk.com/real-estate-law/paying-rent-when-property-foreclosure-316199-2.html) sticky thread, the bank should have given the tenants a 90-day notice. Depending on when this was done, that might be the problem.