Technical anatomy of an .rda language pack
Right-click on and open it with a simple text editor like Notepad. Press Ctrl + F and search for the setting.
Navigate to your AppData folder. Press Windows Key + R and type %appdata%. Go to Ubisoft \ Anno1404 \ Config. Right-click Engine.ini and open it with Notepad.
The Venice expansion requires its own specific language file, distinct from the base game. While the base game might use an eng0.rda file in its main directory, the Venice expansion looks for its specific version within its own subfolder. How to Install the English Language Pack
Navigate to your AppData folder: %APPDATA%\Ubisoft\Anno1404\Config (and ...\Anno1404Addon\Config for Venice). Open the Engine.ini file with a text editor like Notepad.