No resort in Thailand would have that many foreign workers and especially not in professions like masseuse which is reserved exclusively for Thais.
The show has foreigners working as managers, desk clerks, masseuses, "spiritual counselors", "health mentors" and dock hands.
Characters greet other characters by saying "swastika" which is NOT a Thai word or even close to the actual greeting.
(A man would say "sow what dee khrap" and a woman would say "sow what dee ka.)
No one would EVER say "swastika".
They are at a resort on Koh Samui, an island in the Gulf of Thailand, but during the yacht cruise, they tour islands located around Phuket and Krabi which are on the other side of the Kra Isthmus that separates the Andaman Sea from the Gulf of Thailand, over 250 kms away across land.