The “best” way for an uncut English experience is to reinstall the game via VPN activating a US/UK key, or apply an official uncut patch (search “Mafia 2 uncut patch” carefully).
Whether you want to switch to your native tongue for a better story experience, practice a foreign language, or fix a version that launched in the wrong region, you need the method—not just the first one Google shows. how to change language in mafia 2 best
Many Steam Deck users have reported that Mafia II: Definitive Edition may not respect the system language set in Steam and can launch in the wrong language. The best way to solve this is to disable the game's launcher: The “best” way for an uncut English experience
Choose your preferred language from the drop-down menu. The best way to solve this is to
Changing the language in Mafia 2 on PlayStation is similar to the Xbox process: