I was thinking about this earlier so I’m gonna make it into a post
Naruto: Swears a lot, like a lot a lot. He calls his friends “fucker” and “asshole” like they’re terms of endearments, which they kind of are to him. He doesn’t swear in front of Tsunade because she will box his ears, even though she’s just as bad. Naruto will sometimes say “Damn it!” in class and Iruka has to take him outside and lecture him even though he realizes it’s a lost cause. He never writes him up though. Naruto has never swore at Sakura, and never will. Sasuke has occasionally thought that Naruto has forgotten his name because he only gets referred to as “bastard” or “asshole”.
Sasuke: He pretends he’s above such “common language” and often tells Naruto that the fact that he relies on swearing shows a lack of vocabulary and lack of whit. However, Sasuke swears when he is really pissed off or really embarrassed. His go to phrase is “Fuck off.” One time when he stubbed his toe at home he yelled shit and his mom heard him, and the look of shock on her face made him sorry about it for weeks. He still feels guilty sometimes.
Sakura: One time she called Sasori a piece of shit motherfucker in the cafeteria and literally everyone stopped talking. It was really big school news. Naruto was home sick that day and he regrets not going to school with every fiber of his being. Sakura’s go to phrase is “Shut the hell up”
Ino: When she’s hanging out with Sakura, Hinata and Tenten not so much, unless she’s talking about some douchebag dude. When Ino hangs out with Kiba and Naruto she’s just as bad as the rest of them. Frequently calls Shikamaru a Lazy Ass.
Chouji: Never. When he was in the fifth grade he heard Kiba say shit and he went home and asked his mom what it meant, and she took away his PS2 for three days. He really wanted to play Jak and Dexter. It was a hard three days.
Shikamaru: He really only ever says damn. Damn it, Damn you guys, Damn. His usual reaction to seeing Temari is Daaaaaammmmmmmnnnn but he doesn’t say that out loud
Kiba: Like a sailor. It’s sooo bad. Worse than Naruto, and his mom doesn’t give a shit so he doesn’t even curb it in front of his parents. It makes Shino wince whenever he goes over because that would not fly in his household. The indication that Kiba is about to cry in a movie is him going “Shit man” in a really wobbly voice. Comes up with really creative insults that make Naruto laugh and Hinata embarrassed. Neji is so disgusted.
Hinata: Her parents say heck. She didn’t know what the f word was until she started hanging out with Kiba. She still blushes when he says fuck more than 5 times in 1 minute. She reprimands him from behind her hand, he doesn’t stop.
Shino: One time he said “fuck you guys” when Naruto and the guys hung out when he was out of town and everyone was freaking out because they couldn’t tell if that was like a playful haha wow fuck you guys!! or a FUCK you guys. Whenever Shino swears (rarely) it makes everyone really nervous.
Rock Lee: He never wants to insult anyone. Gai doesn’t swear and neither will he. Naruto payed Lee five dollars to say shit once and it was just so awkward for everyone involved. Lee bought Tenten and Neji snow cones with the money.
Tenten: Doesn’t in casual conversation, but when she gets really frustrated or whenever she plays video games it slips out. Or whenever she hurts herself on accident, which happened more in middle school but less now. Often walks in on Lee/Naruto/Kiba or some combination of the three and yells “What the hell are you idiots doing?” Tenten is mom.
Neji: He also has the attitude that Sasuke has where he is “above” such language, but is one of those ones that mutters strings of curses under his breath when he thinks no one can hear. Naruto heard him once and he was honestly spooked.
I can’t believe I spent time on this.