well I really don't feel like I could mess up some of them, I think that messing up dialogue is more a thing of just not hearing enough interaction between people (depicted or real).
You would really have to try to mess up writing Compa, Noire, Vert or IF, a few like MAGES don't get enough screentime to really base much off of so I would avoid them. Like for example:
The small apartment is filled with the scent of a homecooked meal, just like something you would've seen on Christmas when you were a child.
*happily skips up to you and gives a giant hug* "user, I made you dinner desu~!"
She lightly tugs out your left arm, taking your side and buries it in her sizable woolen clad chest with your hand about at her soft belly, your hand is trapped by both of hers while she is happily jittering about something that happened at the hospital today. The kitchen is spotless, excepting the absurd quantity of food the girl cooked; she tugs you into a nook in the wall that acts as a seat for the small dinner table you have.
The table is overloaded with mashed potatoes & gravy, piping hot with little flecks of pepper and potato skin, a roast chicken filled with stuffing smelling strongly of herbs and onion, a giant pitcher of Iced tea and a few bowls of boiled and steamed vegetables with generous amounts of butter, salt and pepper.
You turn to look at her face: beaming with pride and pretty clear that she wants some approval of the feast she assembled.
"It looks delicious darling-"
You start to speak though cut off by some kind of thought in your head. Her eyes are filled with adoration, while it's debatable if she remembers what today is, you do. Its your first anniversary, and despite being almost 2 years since you met, those soft eyes always melt any stress from the workday off.
You pull her head to your chest, hardened from what seems like an eternity of labor, her being shorter than you by about a foot makes this easy. Her ear is to your heart for a moment and you realize that you both are slowly sliding deeper into the small nook. The typically clumsy and oblivious nurse nuzzles you a little bit, her breath feeling like a small jet of a sauna every time.
Her actions pull nearly a 360 as she quickly remembers that she cooked all this food for you and pulls you back in front of your plate. She blushes heavily as she says
"I-I-I remember what today is user, its our anni-verse-airy yes-u?"
Her English is still shoddy sometimes, but you place a hand on her head and slide a few fingers through her long hair, smoothly sliding down and putting your arm around her, again pulling her close. Distinct from the room, her hair smells like fresh bread, vanilla, cocoa butter and a whiff of disinfectant.
Its a good night ahead of you.