MSI安装程序错误对话本地化（WiX）

I have created an MSI installer for a .NET 3.5 application written in Visual Studio Express 2008. The installer UI is localized (to danish) and looks fine. My problem is that errors, say a previous version is installed and needs to be removed first, the error dialog is in english. How do I localize error-dialogs too?I have created an MSI installer for a .NET 3.5