A: Yeah right, like there’s NO sarcasm in Japanese.
B: Yes, that’s right. There’s no such thing as sarcasm in Japanese.
A: Yeah, like NOBODY is sarcastic in ALL of Japan.
B: You can say that.
A: And that’s because you know EVERYBODY in Japan, right?
B: Well no, but Japanese doesn’t really have the capability for sarcasm. There isn’t even really a word for it in Japanese.”
A: Yeah, Japanese like totally can’t express even the CONCEPT of sarcasm.
B: Well, the closest thing I can think of is saying 「はい、はい」 to be dismissive instead of being agreeable.
A: And you know EVERYTHING about Japanese.
B: Are you trying to be sarcastic?
A: I dunno. I thought I was just speaking randomly in all caps for no reason.
You can translate this back into Japanese for fun times!