so everyone thinks that kara’s this sweet kid who never uses language stronger than ‘hell’ and ‘goddamn’, but when she’s really frustrated she sometimes goes off in kryptonese and no one knows what she’s saying, until one day clark and astra are there, and alex asks them to translate, and clark just goes bright red and refuses because, honestly, it’s filthy and some of the anatomy involved doesn’t really translate, and astra asks him why he’s looking at her, because she didn’t teach kara how to say that (even though she probably totally did)
supergirl headcanon so what if Clark doesn’t know any slang because he learned kryptonese through manuscripts and videos and other boring educational avenues so when Alex asks him to translate Clark only gets half of it because ‘that’s not supposed to do that’ ‘why would Kara start talking about prostates?’ Astra sort out of looks at Clark and mourns the loss of kryptonian culture even if it’s super vulgar she sees it as a form of poetry she’s touched Kara remembered some of the choice phrases from years ago and is impressed with the depraved phrases kara’s come up with since because that really /isn’t/ supposed to do that when Astra busts out laughing it’s kara’s turn to go bright red because she’s not used to anyone picking that up later they spend time trading and honing the insults and curses they’ve picked up over the years they have crash courses to teach Clark when he’s in town via stuffidontneed
# and alex is surprised because while kara did teach her a little bit of the language # she had no idea that kara kept all the good insults to herself via @karaalex
alex being, not just surprised, but insulted and a tiny little bit betrayed and the next time, just before they spar in the ring, she slugs her in the shoulder because do you know how much i needed to cuss that alien out that one time, kara, because it was a lot, kara, and i’m your sister, gdi, and you kept this from me, and all those times i got in trouble for swearing as a kid, while you were saying that behind the vice-principal’s back!? how dare you