As mentioned above, intonation changes the meaning:

🔹 Como mencionamos antes, la entonación cambia el significado:

Rising intonation (the voice goes up): This is a real question. You want information.

She's from Spain, isn't she? (rising) => I'm not sure. Is she?

Falling intonation (the voice goes down): You are just making conversation or asking for agreement.

Lovely day, isn't it? (falling) => I know it's lovely. I just want you to agree.

In general, most question tags in casual conversation use falling intonation.

🔹 En general, la mayoría de las question tags en conversación informal usan entonación descendente.