[Thankfully, Deku's perceptive enough to know when he's making someone else feel awkward, even when he's awkwardly flailing about himself. So he does his best to calm himself down.]

It's okay! I mostly have good feelings about the name now, so please don't worry about using it!

[Even if Kacchan still used it as an insult, everyone else in his class used it positively now, and it honestly made him feel more at home.]

Yes, it's the language we speak in my country back home, Japan. It has a lot of...wordplay, I guess you could call it, that doesn't exactly translate well, from what I've heard.

[At that last part, he hurriedly waved both of his hands in front of him.]

No, no, that's not it at all! [Well, not entirely it.] I was in a tense situation back home when I got pulled here, and when they explained what we'll be fighting...

Well, it's a little stressful, to say the least.

[A beat, before he awkwardly continues.]

I just don't want you to think I'm being rude! I'm sorry I gave you the wrong impression!