(sic) is latin for something, but here, it means "leave it alone". Sic can be used if someone spelled something wrong, or cursed, or sexual stuff. I didn't make a rule, or a set of rules, (because I didn't want to come off as Strict) so, yeah.
Sic can be also used if someone didn't word something right, and sic can be seen with these "()", these "" or in "italics", or without.
(I adopted it from TFwiki and wikipoodia and not Transfanon,lmao)