The reasons for this are varied, but usually point towards marketable, linguistic or cultural differences. Some titles may not be easily understood in other parts of the world, and may even be considered offensive. Most title changes are commercial. An example is Italian director's Sergio Leone's 1971 film Duck, You Sucker!, initially released with this title as he was convinced it was a well-known English saying. When the film performed poorly, it was subsequently rebranded as A Fistful of Dynamite, similar in name to his 1964 film A Fistful of Dollars, part of the successful Dollars Trilogy.

When Scholastic Corporation bought the U.S. rights to Harry Potter and the Philosopher's Stone, they thought that a child would not want to read a book with the word "philosopher" in the title and,^[1] after some discussion, the American edition was published in September 1998^[2] under the title author J. K. Rowling suggested, Harry Potter and the Sorcerer's Stone.^[3] Rowling claimed that she regretted this change and would have fought it if she had been in a stronger position at the time.^[4] Academic Philip Nel, who specialises in children's literature, has pointed out that the change lost the connection with alchemy.