Joe Stallone prompts the cast through the correct pronunciation, based on precisely where the character falls in the world: country, class, gender, role.
Recently, the cast of Agatha Christie's "Witness for the Prosecution" has been running lines and concentrating on the exact proper diction. It takes time and arduous work, but the company, including the director Jaie Deschene, are determined to make it as accurate as possible.
Also, as thrilling and surprising. Cuz it is Christie after all...