Thread:Gsimenas/@comment-34692810-20180214150322/@comment-6697950-20180214153448

For two main reasons:
 * 1) Any naming change on the wiki must be approved by an admin, usually after a community discussion, but the latter is not always necessary (such as when the author himself gives the official English name for a character/term/etc.). This is done to ensure that people don't change naming randomly because some subtitles or something used (incorrectly) some different naming, as well as to ensure that consistency is maintained on the wiki.
 * 2) On this wiki, the Yen Press translations are not considered to be on the level of an official translation in regards to naming. This is because 1) They can't be bothered to contact the Japanese side for actual official terms and instead prefer to use sources that make up their own terms (e.g., Crunchyroll); 2) Because of point #1, they have been wrong with their naming numerous times (e.g., Zexceed, Ronie, Algo, Xaxa - the last one was even given in the Western alphabet in the original text; still managed to mess up capitalisation); 3) They can't even be consistent with their own naming. They have three versions for the "official" name of The Army and three different names for the exact same quest. Bonus) They can't even maintain consistency with other "official" translations, such as "official" anime subtitles, e.g, http://swordartonline.wikia.com/wiki/Evil_Gods - three different "official" translations and all use different translations for the same term.

Because of reason #2, we are not obligated to use Yen Press's naming on the wiki. Instead, we may hold discussions on specific names/terms to adopt from them if their translation sounds better than what we're already using and there's no actual official source that says anything otherwise. That's why we have reason #1 in place.