Mermaids “talk” via whale-like humming. Unlike humans who rely on pre-defined words for expression, mermaids can directly convey and understand emotions and ideas based on tone.
Due to mermaids communicating based solely on tone, they’re able to not only learn human languages quickly, but assess a human’s true character the moment they speak.
It’s no coincidence that throughout history, rowdy sailors and pirates have been drowned by mermaids.
Pirate: Hello, darling 🙂 Mermaid, analyzing tone: [Dishonest. Condescending. Bad breath.] Mermaid, about to sink the ship: Hello to you too 😉