A less serious - but still pertinent question - is why nobody at Citadel seemed to notice Mason's unconvincing American accent.

Source: https://screenrant.com/citadel-season-1-biggest-questions/

From Miss Piggy and Kermit making an appearance to Olly Murs debuting an American accent, there were a lot of awkward moments.

Source: https://www.devonlive.com/news/celebs-tv/coronation-concert-fans-spot-awkward-8422502

Here, he's given a wig and forced to use an ill-fitting American accent as his multiverse detective chases after the evil doppelganger of Jet Li's innocent cop.

Source: https://screenrant.com/jason-statham-every-action-movie-ranked/

His flawless non-regional American accent was the result of some neverending method acting.

Source: https://www.buzzfeed.com/tori_honore/actors-good-at-accents

I'm doing an American accent in the show, and there are just some phrases that are impossible for me to get my Australian mouth around.

Source: https://www.cbr.com/star-trek-strange-new-worlds-jess-bush-interview/

I remember very well, and it used to fascinate me and annoy to a certain extent, when spending much time in Russia in the early and mid ’90s, that so many young Russians spoke English with an American accent.

Source: https://www.pressandjournal.co.uk/fp/lifestyle/5297032/george-mitchell-whats-in-a-voice/

Still speaking in an American accent the Welsh teenager told the jury how she heard a gun going off, and saw her co-accused holding a weapon.

Source: https://www.walesonline.co.uk/news/wales-news/elizabeth-jones-cleft-chin-murder-27150667