Make sure the final link from the referenced site is pointing to a CAB file from the Microsoft's site "download.windowsupdate.com".
Please report any discrepancies.
They are separated into 'x86' (32-bit) and 'x64' (64-bit) groups so make sure you download the correct one.
After downloading the required language packs, you can add it to the NTLite's Updates page to integrate them to the image.
More info
here.
You must integrate language packs together with, or before the Updates, or they will be overwritten by the language pack.
Choose the newly added language pack on the Unattended page settings, "UI Language" to set the required language during Windows setup if required.
For other FOD ISO links, see
this post for more info.