Mundane swears like that are totally fine on Tapas! I'm unsure about webtoons though, I've heard some people had to censor the work "dick" on WT but I don't know if that's changed at all.
As for slurs that target specific groups, I know that Tapas allows them even without censoring, but I would definitely tag as Mature and mark profanity, just as a heads up for readers. Not sure about WT in this case.
