In normal conversational Japanese, it's not normal to cuss... I think the localizers (the people who take a translation and make it more western) added Trunk's colorful vocabulary to make him contrast the normal characters. It could also be that the anime localizers were trying to help the lip-sync team by giving him more syllables
****him up if puts his hands on you beat his ***up **** him/her if he/she cusses you out go hard on them!
cuss back
"Bad words", or swearing
Yes.
frenzy
I don't really know but I could see if someone cusses or not like trace Cyrus cusses because he looks like a person who cusses I don't think so but I've seen her say crap but it's not a bad word
Yes, Adam Gontier of Three Days Grace does cuss.He cusses in his songs:RiotGone ForeverWake UpOverrated
Eminem, in his song, Not Afraid
no he cusses a lot
I would say No. not Sure but i mean everyone almost cusses you get mad/lost love/ almost everyone cusses when they lost love or got mad about something
vegeta is trunks dad and bulma is trunks mom
No, Future Trunks is future Trunks. Broly is Broly