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Dogs are actually very intelligent, as you all know. You dog might be suitable for scientific studies. Scientists have studied elephants and determined that they actually have their own language which human scientists have been able to mimic and catalogue. We know from our own experiences dogs can understand human verbal commands. So, it`s not surprising that your dogs can tell when your saying bad words or using foul language -- it`s in your tone. ndog pet animal puppy terrier cute jack russell terrier beagle canine grass white brown jack russell jack russell breed adorabl doggy small young domestic little mammal pup funny