So I have already ran over how to inject the Lang packs using the old DISM command line tools but here is how you do it the power shell way which makes life a little easier and almost any nood can follow

##################################################################### # Enviroment Setup # Wim Image Location = C:\TMP\WIM\Install.wim # Image Mount Location = C:\TMP\MNT # Image ScratchDirectory = C:\TMP\SRC # Lang Package Location = C:\TMP\Lang Packs # # Remember to use elevated permissions to run these operations # ##################################################################### # Show a list of WIM index's within your file get-WindowsImage -imagepath .\WIM\install.wim # Remove any none required WIM Index's remove-windowsimage -imagepath .\WIM\Install.WIM -index 2 # Mount WIM Image Mount-WindowsImage -ImagePath .\WIM\install.wim -ScratchDirectory .\SRC\ -Path .\MNT\ -Index 1 # Add Packages Add-WindowsPackage -Path "c:\TMP\MNT" -PackagePath .\package.cab # Save your changes to the image Save-WindowsImage -Path "c:\TMP\MNT" # Unmount the Image Dismount-WindowsImage -Path "c:\TMP\MNT" -Save