Me? Every other word.

Balthier:

Rarely unless he's working.

Then you'll get a string of very... inventive cursing

It's never... crude but it's definitely interesting.

Maraas:

He still has a bit of Qunlat in him, so if he ever swears, like fuck you're gonna know.

He'll usually just scowl and glare

Teddie:

ffffft

he may repeat something he's heard, but he'll never deliberately swear

But damn if stupid stuff doesn't come out his mouth all the time

Alice:

why would she when she has insults like "you oozing sore of depravity"?

hoboify: He is. He's such a grouch XD

Alice may have a 'damn' or 'hell' slip out, but her language is very clean. She prefers polite, Wilde-esque retorts

...Teddie please do not start to parrot the new words you learn form Gokudera.

He's heard most of them from Kanji and Yosuke already and Sensei has had a talk with him that it's not the best idea to parrot them

but even for Kanji and Yosuke, their swearing is pretty standard stuff

so if he hears something more creative, he's going to be like "...I have no idea what you said but it was awesome 8O"

Teddie if you call someone 'Mcdouchehooker' I will laught so hard.

Somehow this needs to happen

it does. I need to poke Kanis and see if I can in fact get Gokudera to splurt out a nice "McDouchehooker" for teddie

teddie learns a new word :3

and uses it forever

Best word. Be sure to use it to all your friends from home so they can see what good influence people have been for you here.

he so will