Formal:
* Ua maikaʻi ʻoe i kāu ʻōlelo. (This is a literal translation of "You are good with your words.")
* Ua kūpono loa kāu ʻōlelo. (This means "Your words are very appropriate.")
* Ua maikaʻi loa kāu ʻōlelo ʻana. (This means "You spoke very well.")
Informal:
* Ua maikaʻi! (This means "Good!")
* He ʻoiaʻiʻo! (This means "That's true!")
* ʻAe, ʻoiaʻiʻo. (This means "Yes, that's true.")
The best way to convey "well said" in Hawaiian depends on the context and your relationship with the person you are speaking to.