Seems like Microsoft changed the name of the Language Packs from “Microsoft-Windows-Client-LanguagePack-Package” to “Microsoft-Windows-Client-Refresh-LanguagePack-Package”. A small distinction, but huge when MDT or SCCM can’t find the language pack name! In MDT, go to the DeploymentShare’s \Scripts folder, edit “Deploywiz_Initialization.vbs”, and go down to line 1101 – you’ll see that LPQuery is set to look for only the old Language Pack package name. Add the new package name, and things will work again (you will have to update any media you’ve created, of course).
I found this while searching TechNet, here:
http://social.technet.microsoft.com/Forums/en-US/mdt/thread/5253b2e3-a60e-43a5-921d-a9acc6485d35
The change should have line 1101 looking like this when you’re done:
LPQuery = “PackageType = ‘LanguagePack’ and (ProductName = ‘Microsoft-Windows-Client-LanguagePack-Package’ or ProductName = ‘Microsoft-Windows-Client-Refresh-LanguagePack-Package’) and substring(ProductVersion,1,7) = ‘” & left(ImgBuild,7) & “‘ and substring(ProductVersion,5,4) >= ‘” & mid(ImgBuild,5,4) & “‘”