delitriuz/forza-language-switcher

Forza Language Switcher is a small Windows utility that solves a specific limitation in Forza Horizon 5 and Forza Horizon 6: the games do not allow you to mix a Chinese interface with voice acting in a different language. Players who want to read menus and subtitles in Chinese but hear the original English (or other) voice-over have no way to configure this combination inside the game itself. This tool works around it by swapping the game's language files on disk. The way it works is straightforward. Each language in the game is packaged as a zip file in the installation directory. The tool copies the text-and-UI zip for your preferred display language over the slot that corresponds to the voice language you set inside the game. Before doing so, it saves the original file as a backup. The result is that when you launch the game and pick, for example, English (UK) as the in-game language, the game loads English voice acting but reads its menus from the Chinese language package. The tool auto-detects your Steam library to find the game path. It remembers which game you last worked with and tracks the current swap state in a small JSON file next to the executable. If the game receives an update that reverts the swapped files, the tool detects the change the next time it opens and prompts you to reapply. You can also swap multiple voice language slots independently, each with its own backup. Restoring the original files is a single click: select the voice language you swapped and click Restore Original. The backup files are kept until you delete them manually. The tool is a compiled Windows executable built on .NET 8, which requires the .NET 8 Desktop Runtime (a roughly 55 megabyte one-time install). Source code is included and can be compiled with a single dotnet publish command. The project is released under the MIT license.