The foster family aren’t able to take the dog back but is it a case of a foster family need to be found to take dog back and waiting for one to become free
Have you tried contacting their Facebook/SM page.
It sounds like ddog needs a bit of training and is probably too big and bouncy for your young children and the reactive part I would say was something that you have to consider is a side effect of what this dog has endured
The dog needs an older household and someone who can spend time training the dog and spending time getting them used to life indoors and outdoors on a lead
Also not sure if you have the raw hide chews. These I think for certain dogs bring out the worse reactions.
Can honestly say that my own ddog was the sweetest most laid back girl
Brought her a rawhide chew and she turned into a tooth bearing snarling dog very protective of her chew.
Took the rawhide chew away and once she didn’t have sight of it she turned back into her laid back self and it felt like she was apologising to us for her out of character outburst. Checked again to see if it was the chew a few months later and the same reaction occurred
Can you contact any reputable trainers to see if they know of anyone who is looking for a dog to train.
The dog has probably got lots of energy and was used to having freedom and is now in a different country trying to work out what you want given the language barrier and is not getting the exercise and stimulation they need and is responding with the only way ddog can respond.