Holy shit, I had no idea.
Brother, it's current year. You should never trust anything "Localizers" put out unless you've double-checked it yourself.
In this very chapter, ReRuri sasses her mom after asking about the horns. Meanwhile mom looks like she hesitates for a bit before finishing her answer, like she doesn't know.
RawRuri asks mom what they are, mom looks at her for a moment before plainly telling her they're horns, and RawRuri acknowledges it plainly.
The joke is that mom is comically underreacting, not that she's stating the obvious. But you wouldn't fucking know that because the moron that got paid to do this decided he was actually a second writer.
Another thing you probably didn't know:
There's no slang in this manga. Not that you'd know that reading this butchered shit. The way they talk, you'd think this is some dank, zoomer banter they've got going on. But all they're doing in the original is speaking casually, with contractions.
Are there any scanlations to read?
Since it's licensed, nobody wants to touch it. Otherwise I would personally have taken this project on and shown that loser how it's done. Wouldn't be the first time, and it won't be the last.