We often see the image of the rampant lion used as a symbol in heraldry and other places. I understand the significance of the lion, and I am aware that ancient art often incorporated the lion, but the rampant lion as mentioned is a very specific representation of the animal.
Today we call the different lion poses by different names and ascribe to each of them different meaning, but at some time in the past these names and associated meanings did not exist. I therefore would see no issue with any one entity using a rampant lion as a symbol, but its perseverance is so common that I wonder where the copy-cat idea started.