In some European countries, Moana is titled Vaiana because Disney faced a trademark conflict involving the name Moana.
The alternate title was used across much of continental Europe, and the heroine's name was changed as well. Countries including Spain, France, Germany, the Netherlands, Portugal, Sweden, Norway, and Poland released the film as Vaiana or used Vaiana in localized versions. The United Kingdom and Ireland retained the name Moana.
The change is often confused with the film's Italian title, Oceania. Italy used that title for a separate localization decision, reportedly because Moana had strong associations with Italian adult-film performer Moana Pozzi. Thus, Vaiana is the trademark-related answer, while Oceania is chiefly associated with Italy.
The naming issue did not change the character's Polynesian setting or story. Disney's 2016 film follows the daughter of a village chief who sails across the Pacific with the demigod Maui to restore the heart of Te Fiti.