User blog comment:J Fan/Future Short films/Tales of the Code/@comment-5120604-20120421130508/@comment-1984959-20120422030836

They're right, Sailor; Teague was Lord of Madagascar. And there's no need in changing it, as per an excerpt from Pirates Online-related sources:
 * So when Captain Teague left the Court and gave his seat to his son, Jack Sparrow, Jolly vowed revenge.

Comparing it to the current portion you're suggesting to change:
 * Teague abandoned his position of Pirate Lord(they weren't specific on "Lord of..."), giving his seat to his son, who became a Pirate Lord of the Caribbean Sea.(they never gave specifics on Jack being Lord of Madagascar, only that he was given Teague's seat and would become Lord of the Caribbean)

Hope this helps! :)