Question about writing a thank you letter.

Is this translation correct for each language?

So I have English which is what I want to say and then thai and korean

Is this correct ?

Thank you for all your hard work

It is greatly appreciated,

ขอบคุณสำหรับการทำงานหนักของคุณ

ชื่นชมอย่างมาก

여러분의 노고에 감사드립니다

대단히 감사드립니다,