How are we to best address the cast lists of movies that give credit for a role to an incorrect person?

For example, the end credits of the bilingual Brazilian movie Trash (2014) have one Enrique Diaz as Mr. Sobral (a character who speaks English), but the character is actually played by Michael Nyqvist who is uncredited.

Originally I submitted a cast list update to replace Diaz's name with Nyqvist's but including the attribute "(as Enrique Diaz)" and to add Diaz as a new addition to the cast with the "(credit only)" attribute: 170613-144923-907000. These changes did not go live, so I figured they were probably improper. The second time around, I opted to alter the item for Diaz to include the attribute "(credit only)" and to add Nyqvist as a new addition with the "(uncredited)" attribute: 170710-172059-713000. Only part of the submission went live, and Nyqvist's name was not added. The only way to verify that he is indeed in the movie is to watch it, I'm afraid. It is very unlikely that Diaz just happens to look exactly like Michael Nyqvist, but strangers things have been known to happen. It's also not terribly clear that Diaz even exists (and the name could be an alias). I've decided to resubmit the update: 170725-193649-556000. I hope it is approved.

Anyway, for future reference, what is the best way to approach this? Is it best to leave the cast list alone and instead simply include an item in a movie's goofs section or its trivia section?