There are two species of werewolf in Twilight canon. One, the Children of the Moon, gets no screentime or detailed treatment at all. They were from Europe and are now presumed extinct, killed off by some vampires at the behest of one vampire who didn't like them.
The other, the Quileute tribe wolves, features more heavily. Their older legends don't use the word "werewolf"; the ones who show up in the story call themselves werewolves because that is the obvious modern American thing to call a person who can turn into a giant wolf. The "wolf" part in particular was an arbitrary selection made when the species came into existence; they could have been bears or eagles or voles or something instead. So the technical term for them is "shapeshifter", but this doesn't overcome the sheer obviousness of "werewolf". This is all canon or obvious extrapolation therefrom, not fanon.
Thanks for answering. I also looked up the definition of "werewolf" on a Twilight wiki, but I didn't see any explanation.
I was really hoping the canon explanation was pre-Columbian contact between Vikings and native werewolves in North America. The prequel series writes itself!
In the vein of the Harry Potter and the Methods of Rationality discussion threads this is the place to discuss anything relating to Alicorn's Twilight fanfic Luminosity. The fanfic is also archived on Alicorn's own website <strike>(warning: white text on black background)</strike>.
Previous discussion is hidden so deeply within the first Methods of Rationality thread that it's difficult to find even if you already know it exists.
Similar to how Eliezer's fanfic popularizes material from his sequences Alicorn is using the insights from her Luminosity sequence.
Spoilers for the fanfic itself as well as the original novels need and should not be hidden, but spoiler protection still applies for any other works of fiction, except for Harry Potter and the Methods of Rationality chapters more than a week old so we can freely discuss similarities and differences.
EDIT: Post-ginormous-spoiler discussion should go to the second thread. (If you have any doubt on whether you have reached the spoiler in question you have not.)