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The sad thing about Les Prophéties is that there is no known English translation (yet). There's this translation into slightly more modern French on Internet Archive, which was found by @liminalpsych, but the scan is pretty low quality, at times illegible (including Sebile-related parts), and not searchable.
It's worlds better than nothing, and you can glean many gems just from the contents and introduction, which are in English. Dinadan finds a prophecy in a graveyard, Lancelot hangs out with Lionel and Bors and rescues Galehaut, there is at least one gryphon and a dragon, Sebile and Morgan have a love/hate relationship, Morgan and Bruce have a surprisingly wholesome friendship and he patches her up after a fight, Percival hangs out with a hermit and has some love affairs, one of the Ladies of the Lake does a lot of stuff, Tristan does something, Gawain is there... It has something for pretty much everyone.
Alas, the days when it can be read in its full glory are yet a dream.
vulgate if you don’t have its essential reading
wackier recommendation Les Prophéties de Merlin it has toxic Morgan Seblie yuri and medieval witch power scaling, also everyone wants to bang old man Merlin very chaotic (warning highly misogynistic even for its time )
Oh I don't have vulgate so I will defo get that!!!!
TOXIC MORGAN SEBILE YURI?! YES PLS why does everybody wanna bang that old dude? Can I buy Les Propheties online translated into English?