Even legitimate buyers on GOG, Steam, or EA App have reported that during the download or installation process, the English localization files fail to unpack correctly. This leaves the player with a silent Psycho or a UI that mixes English menus with Polish subtitles.
Navigate to the .. \Crysis Warhead\Game\Config folder or the main directory. Open system.cfg with a text editor (like Notepad). Crysis Warhead English Language Pack
If the files are already present in your directory but the game still launches in a foreign language, the Windows Registry is likely pointing to the wrong language code. For 64-Bit Operating Systems: Press Windows Key + R , type , and hit Enter. Even legitimate buyers on GOG, Steam, or EA