กลับแล้วนะ

No, it's too informal. Use 'ขอตัวกลับก่อนนะครับ/คะ' (Khor tua klap kon na krap/ka) instead.

'Klap' means you are returning home. 'Pai' just means you are leaving the current spot.

Not at all! It's very friendly among friends and family. It's only 'rude' if used with high-ranking superiors.

Usually, no. Dropping the subject makes it sound more natural and less like a textbook.

'La' is a short, casual version of 'laeo'. It's very common among teenagers.

Yes, you can use it to mean you're finishing your 'session' at a place, like leaving the office to go to a bar.

You can say 'Krap/Ka' (Okay), 'Chok dee na' (Good luck), or 'Phrung ni joe kan' (See you tomorrow).

Yes, the phrase itself is gender-neutral. Men can add 'khrap' and women 'ka' at the end for extra politeness.

It's a low tone. Imagine your voice going down as you say it.

It's better for spoken language or instant messaging. For emails, use more formal closing phrases.

It doesn't have a direct translation. It's a particle that softens the tone and asks for the listener's agreement or attention.

Yes, it is standard Central Thai and understood everywhere, though regional dialects might have their own versions.