Plenty of werewolves in Glenumbra... and they all seem to be "perma" in their WW form. Granted, one could argue that someone might went insane & feral when he/she stays in Werewolf form for a year, but as far as I can tell it is possible lore-wise.
I think there was even a side quest in one of old TES games (can't remember exactly) in which there was someone who stayed in Werewolf form too long and could not transform back.
Edited by Tommy_The_Gun on February 8, 2021 6:40PM