Board Thread:Questions and Answers/@comment-1085911-20160418090211/@comment-5164970-20160425085730

WarBlade is right that they were never mentioned as Scarlet Witch and Quicksilver in the movie. But I did notice when I watched in the cinema that they were mentioned as Scarlet Witch and Quicksilver in the credits.

I asked an Admin (ADour) what do after I noticed this back in May 2015.

He said to use Scarlet Witch and Quicksilver in the respective character article's TITLE (not Current Alias) and in the Avengers: Age of Ultron Appearances. We wouldn't put them as Scarlet Witch and Quicksilver in their Current Alias and for the Avengers (Earth-199999) article, and whatever article they were mentioned in, they WOULDN'T be named as Scarlet Witch and Quicksilver, instead as Wanda and Pietro (since the aliases aren't considered canon).

Of course, you would've known that if you read my edit summary instead of undoing my edits without giving an edit summary.

Aside from ADour, I believe WarBlade was also a part of the conversation back in 2015 and so was LoveWaffle, and we have been applying/enforcing the decision since.