Tetelestai – What did Jesus really say in John 19:30 assuming he spoke Aramaic or Hebrew?

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I have been researching for a long time John 19:30, more specifically the word Tetelestai (τετελεσται) in the Greek. But recently came across the topic of the Hebrew Gospels (possible late translations) and is fascinating.

1. What did Jesus really say in John 19:30, assuming he spoke Aramaic or Hebrew?
2. Or what will be the best translation to Hebrew, or the best Hebrew equivalent words for Tetelestai coming from the Jewish mindset?