Directed by: M. Night Shyamalan
Starring: Dev Patel, Nicola Peltz, Jackson Rathbone, Noah Ringer
Revealing mistake: During a large battle scene between the Fire Nation and the Northern Water Tribe, the camera pans to reveal a Fire Nation soldier fighting with no one.
Revealing mistake: During the first conversation between Fire Lord Ozai and General Zhao we can see that Ozai's eyes move from left to right while he looks in the direction of Zhao's chest, this revealing the use of a prompter.
Continuity mistake: During the scenes at the Northern Water Tribe, there is a cut in the middle of Aang's lower lip that occasionally will disappear and reappear.
Uncle Iroh: It was not by chance that for generations people have been searching for him, and now you have found him. Your destinies are tied, Zuko.
Answer: The TV show Americanized the pronunciations whereas the movie said them correctly.
The show is American, so with original characters you're allowed to say them how you want.