I am totally willing to work with him, to a point. I only have him and my own two. If it starts affecting my kids I will not keep him. My kids are pretty soft spoken and we don't tend to yell or say some of the things he says, they look at me confused. my 4 year old son has told him a couple of times "we don't say that in our house". During our last talk here he said that "he gets so mad he could puke". no siblings. I assume that he hears these phrases alot as he repeats them. I will try the video suggestion during the next outburst and see how that goes.

I did end up putting him in a different room than my kids and have him flip through some books. Did this for half an hour and now he is happily playing again. Maybe being an only child, he's not comfortable with all the noise/kids around constantly.