To write "don't go yet" in creole, do I need to use the negative PA, like PA POKO ALE?

No, you don't to use "pa".

Don't go yet.
Don't leave yet.
Poko ale.

Don't say anything to them yet.
Poko di yo anyen.

Don't celebrate yet, the game is not over.
Poko rejwi, jwèt la pa fini.

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