If the above methods fail, the language setting might be stored in your Windows Registry. This happens if the game was installed and launched once in the wrong language.
If you have the necessary files but the game remains in another language, you can often force it to English using the Windows Registry Editor. Press Win + R , type , and hit Enter. Prototype 2 Pc English Language Pack
Changing Prototype 2 to English on PC often requires editing registry values to modify the language ID or manually placing English RCF language files into the game directory. Recommended fixes for regional version constraints include altering the registry to set the language value to "69" or using Steam properties to verify integrity. For more details, visit Steam Community . Depot 115323 (Prototype 2 english) - SteamDB If the above methods fail, the language setting