"english or spanish" -- Reference to a video where a guy asked this question to random people, and then depending on their answer followed up with "if you move, you're gay" in the respective language. Later on that video turned into a meme where you just say "english or spanish" and the second part is implied.
Words used in the brainrot part:
Baby Gronk -- a child american footbal player popular on tiktok
Andrew Tate -- popular internet figure, known for his extreme beliefs
munting -- a kind of necrophilic act, google it if you're brave enough
goon cave -- room specifically designated for masturbation
Colleen Ballinger -- conent creator that had some controversy not too long ago
smurf -- an experienced player in an online game that joins lobbies full of new players for the purpose of getting an easy win
shmlawg -- someone you caught in a devious act
Carti -- Playboi Carti, a rapper
So it could be interperted as: "Baby Gronk and Andrew Tate are munting Colleen Ballinger in a room, and Playboi Carti caught them in the act."
Yes, it doesn't make sense to me either in the context of this chapter. And I thought I'm "hip with the kids" and still know Gen Z slang... :c