Dragons appear in mythologies around the world but with variations. A chinese dragon is quite different to a European one, not least in being a bringer of blessings rather than a deadly monster. And yet we don't have any difficulty in applying the word dragon to all of them and knowing what we mean.
A few years ago, I and three other authors decided to write dragon stories, we all came up with different types. Wench Mary Jo created a shape-shifting dragon in the European medieval tradition. Karen Harbaugh drew on her heritage for a Japanese dragon. Barbara Samuel used the magic of the south west United States. And I went over to fantasy land, as I love to do now and then.