Lummie

Corrected entry: In the scene where the young Elizabeth Swann is on the ship and young William Turner is found floating in the water, young Elizabeth says the word "okay," which was not in common usage until the 1830s at the very earliest.

Correction: This type of mistake has been submitted for many other films and while it may not be common that is not the same as being non-existant. There are many explanations how she knew the word, she overheard the word, read about it etc. A word or phrase does not have to be in frequent use to avoid being a mistake.

Lummie