History AnachronismStew / PiratesOfTheCaribbeanDeadMansChest

* While trying to escape the Pelegostos, Jack finds a tincan of powdered dried pepper, with the word "paprika" on it's lid. The name "paprika" is of Turkish origin, and would not enter the English vocabulary until the early-20th century, when the spice became associated with Hungarian cuisine.

* While the movie gives tacit HandWave (with Governor Swann openly pointing out that what Beckett is doing is flagrantly illegal), the fact that the ''East'' India Trading Company has any remit or authority to operate in the ''West'' Indies. Especially to the levels that Beckett does (supplanting sitting Governors etc). Whilst the money and influence the Company possessed could've got him a Royal Commission to do so, he would not be operating ''as'' a member of the EITC, which is what he introduces himself as. Besides this, the real-life EITC is never known to start a war nor any other counteraction against piracy.

* The fact that the ''East'' India Trading Company has any remit or authority to operate in the ''West'' Indies. Especially to the levels that Beckett does (supplanting sitting Governors etc). Whilst the money and influence the Company possessed could've got him a Royal Commission to do so, he would not be operating ''as'' a member of the EITC, which is what he introduces himself as. Besides this, the real-life EITC is never known to start a war nor any other counteraction against piracy.

* The fact that the ''East'' India Trading Company has any remit or authority to operate in the ''West'' Indies. Especially to the levels that Beckett does (supplanting sitting Governors etc). Whilst the money and influence the Company possessed could've got him a Royal Commission to do so, he would not be operating ''as'' a member of the EITC, which is what he introduces himself as.

* The phrase "[[GoingDownWithTheShip The captain goes down with the ship.]]" is uttered verbatim by one of the Flying Dutchman crew members. Its first known usage was in Alix John's 1901 book ''The Night-hawk: A Romance of the '60s'', and it would not enter the public lexicon until 1912 when it became associated with RMS ''Titanic'' Captain Edward J. Smith, who refused to abandon ship during the vessel's sinking.

* Lord Cutler Beckett's flagship ''HMS Endeavour'' is painted in the Nelson Checker, which did not become common until 1805. Further, first rates were not stationed in the West Indies.

* The phrase "[[GoingDownWithTheShip The captain goes down with the ship.]]" is uttered verbatim by one of the Flying Dutchman crew members. Its first known usage was in the 1901 book ''The Night-hawk: A Romance of the '60s'', and it would not enter the public lexicon until 1912 when it became associated with RMS ''Titanic'' Captain Edward J. Smith, who refused to abandon ship during the vessel's sinking.

* In the scene where Jack Sparrow and Mr. Gibbs are interviewing potential shipmates, the drunk French pirate states that he doesn't "give an ass rats" whether he lives or dies. The first known usage of the phrase "I don't give a rat's ass" (which the pirate meant) in pop culture was Leon Uris' 1953 book ''Battle Cry'', and it supposedly originated as a saying by American troops in WorldWarII.