Thread:Trigger009/@comment-995426-20150929065715/@comment-995426-20150929171836

I'm still moving the category back. But considering I didn't just register yesterday, it would be nice if this matter were at least discussed.

Considering I'm also a long-time dictionary editor, I should opine that, yes, both "ninja" and "ninjas" are equally valid plurals of "ninja". But there's also the context of each plural. "Ninjas" is the more domestic plural, and in particular the 2012 TV series says "ninjas" almost exclusively. "Ninja" is more a pedantic plural based on a direct adaptation of Japanese grammar, but tends not to be used so much casually because (a) it's an ambiguous plural, and (b) "ninjas" is already perfectly valid. Compare other alternative plurals: Obviously, a category can only have one name. People of good faith could be excused for thinking "ninjas" is the more dominant plural form, especially when Nickelodeon does everything to reinforce this and nothing to discourage it.
 * "media" vs. "mediums"
 * "octopodes" vs. "octopuses" (vs. nonstandard "octopi")
 * "plateaus" vs. "plateaux" (pronounced the same, spelt differently)

The S: It's apparent that the decision to use the plural "ninja" is now a foregone conclusion. But could you please explain your reasoning for clarity's sake?