Take your dog outside and when he barks, put a name to it and give him a treat. Tell him "bark". Then tell him "stop" with enough force that he stops even though he might not know the stop command yet. If it's said with enough force, he should stop. When he barks again, say bark and give him a reward. Or you can use "speak" for the command. Do this over and over for several weeks. He should understand after a while. Them try speak inside the house after he understands outside the house. Make sure you have his most favorite treat at hand and let him smell it, but don't let him have it until he speaks inside the house on command. After he gets that part down, ask him if he has to go potty. Tell him to "speak for potty". It is a slow process, but with patience, it will work.
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