I don't edit for wikia/Fandom anymore but just by looking around I can confirm that indeed this wiki's lore/story sections have been thoroughly vandalized with copious amounts of head-canon and logic leaps that rely on assumed linguistic nuances extrapolated from translated text, assumptions that fail to take into account what the original Japanese text looked like and lack the necessary cultural context as to what the choice of words in the original was meant to imply. And yes, this AndreaPz01 user certainly seems to be a major contributor to the problem, if not the source of it.
That user's "accurate translation" entries are clearly being put together by someone who isn't qualified to assess why certain terms were translated the way they were. For example Nito's "Gravelord" title is a more contextually accurate translation of 墓王 (romanized in this wiki as Hakaō, while it might as well be Boō) than the term "Tomb King" that said user not only introduced into that story section, but replaced the official term "Gravelord" with, using their own "accurate translation" in a different page as a source.
Moreover, much like what was happening with wikispaces/fextralife when Dark Souls II came out, a lot of egregious assumptions are being made regarding the connections between the games, especially between Dark Souls & Dark Souls III, as user A.S. Raiyan noted.
It is my opinion that:
> These misleading, self-proclaimed "accurate translations" should go away, as all they do is feed re-interpretation of terms that already exist within the game based on alternative wording and the semantics that occur. The original Japanese text is law, and should remain, translations labeled as "accurate" shouldn't.
> Story sections should be divided by game. Under no circumstances should speculation that arises due to an item description in Dark Souls III infect the information being made available to players in the original Dark Souls. Not only because parts of it may assume that the Dark Souls III story already existed when Dark Souls was written, but also because it may contain spoilers for a game readers haven't played yet. This will also help the moderation team and editors better isolate & combat problematic "information" as well as the cross-game "connect the dots" game that certain users might be playing.
> The moderation team should come to terms with the fact that these games tell a decent chunk of their story through speculation. Although unsightly, speculation distinctly identified as such is way less problematic than speculation presented as facts by prolific "I figured it out!" passive-aggressive conspiracy theorist types that seem to engage in edit wars and use themselves as a source. This is what someone trying to turn a wiki into their personal garden looks like and I don't think I've ever seen that end well.
That is all, thanks for reading. I do not envy the task of trying to figure out how to keep things like that in check in a light-handed manner. Good luck.