DD, whilst I agree with your descriptive interpretation of a spade, and with the uses of both spade and shovel, I'm having some difficulties on the shovel aspect. We can, probably, all agree that the spade, no matter the manufacturer, is generally of a standard size and shape. Whereas the shovel, on the other hand, is of two very different shapes. We have your shovel which I believe to be of the square mouthed variety indeed used for scooping and transporting. We also have the round mouthed shovel which was designed more with the purpose of digging holes. The 'round mouth' actually comes to a point to allow for breaking up the spoil with more ease. My conclusion hereis that although we can call a spade a spade with ease the same can't really be said for the shovel
So far as I am aware the EU has not yet passed any laws on the design of either spade or shovel.