I don't know for dogs but I read that other species have different "accents" depending on their group and where they live.
Apparently, animals like dolphins, orcas and whales have different "accents". And birds apparently also sign differently depending on their group and location.
Like, some ducks quack differently, from one region to another. I don't think this can hamper simple communication, but there is apparently variation in their calls.
The pictures make it seems more than what it is. From the video I've seen, he only does two pathetic jumps and barely gets off the ground.