Errors 81, 82 or 84 displays: "The client does not match the accounts native language.Please, use the game native client." There is no known fix as of yet, as Blizzard controls the language restrictions from their servers.Client language files can be adjusted from the options menu.
Download the files from Sven’s site and read the “Read Me.txt” file.
This will contain the most current instructions for installing and setting up the wrapper.
With that in mind, I've put together a guide to help you get the game up and running without having to shed tears while you're at it. Step 1 You must delete the beta version of Diablo III before running the installer.
— PC Users Remember to uninstall the beta version of Diablo III using the Add/Remove programs if you're on Windows XP, Vista, or 7.
This quick “how to” assumes that you have already installed and patched the latest version of Diablo II LOD on your system.