The language of this installation package is not supported by your system

You can get this error when trying to install Office 2010 or Access Runtime probably because the way you extracted the setup files.

If you extract the setup file using Winzip/WinRar/7zip/etc it creates a different folder structure than when extracting using the /extract switch.

So just use:

 AccessRuntime.exe /extract:c:\accessruntime (or whatever is the name of the file)