You can't control humans from speaking coz it's natural for them to speak to communicate with each other. Dogs bark to communicate, to alert and to scare intruders off. Do you confine your dog with a chain? If yes, then it's inevitable for it to bark because he wants to be free. If you confine your dog with a leash, he will naturally become agitated, feel insecure and may vent his energy by barking relentlessly.
You need to give them plenty of exercise in form of walks, plays and training aimed at stimulating them mentally. A tired dog is a healthy dog and they are problem free dogs at home.