Once there were several Snakes who could talk. These are related to the one mentioned in Genesis, but are even more devious.
Before we go any further, I want to let everyone know that I have no aversion to, and actually like very much, real snakes. They are extremely useful reptiles, and keep the rodent population at an acceptable level. Without real snakes, our ecology would be quite less tolerable. The former Mrs. Translator has one in the classroom (not a venomous one) and we together kept a Ball Python until he became too big for safe handling, so we donated Kaa to a university. Please in no way think that I personally dislike snakes, except for the metaphorical ones.