There are many different Polynesian languages, so there are many possible answers to this question. Perhaps the best-known of these is Hawaiian, where the word for both hello and goodbye is "aloha."
In Cebuano, you can say "paalam" to say goodbye.
In Zuni, you can say "yawakwi" to say goodbye.
In Ibanag, you can say "Agyamanak!" to say goodbye.
I Will Say Goodbye was created in 1980.
In Swati, you can say "sala kahle" to say goodbye.
In Dene, you can say "Mahsi cho" to say goodbye.
In Kpelle, you can say "Ka boss" to say goodbye.
goodbye
Goodbye
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To say goodbye in Bemba, you can say "Mwapalanya" or "Shawama."