Peach isn’t exactly known for speaking in full sentences most of the time throughout the games, so it was difficult for Taylor-Joy to bring exactly the same tone of voice that Peach uses for short sentences and exclamations in the games.

Source: https://gamerant.com/super-mario-bros-movie-most-accurate-voices/

They pepper their conversations with laughter, expletives and exclamations, even as they remind themselves of Carl Sagan’s adage, however overused, that extraordinary claims require extraordinary evidence.

Source: https://www.wired.com/story/no-the-james-webb-space-telescope-hasnt-broken-cosmology/