Going down the IT rabbit hole

You can download Internet Explorer 9 in the language that matches your version of Windows or choose the English version, which works with all versions of Windows Vista and Windows 7.

Internet Explorer 9 Download – all available languages and system versions
Group Policy Settings Reference Windows Internet Explorer 9
Windows Internet Explorer 9 Language Packs for Windows 7 and Windows Server 2008 R2
Internet Explorer 9 Product Guide
Internet Explorer Administration Kit 9

Preparing Your Site for IE9