When adding feature packs to a Windows PE image, make sure you also add the corresponding language packs. For instance, you can add the WinPE-Scripting feature pack to Windows PE using the DISM /add-package command like this:
Dism /image:C:\\mount /Add-Package /PackagePath:"C:\Program Files\Windows AIK\Tools\PETools\\WinPE_FPs\winpe-scripting.cab"
This isn't enough however—you also need to add the corresponding language pack for the feature:
Dism /image:C:\\mount /Add-Package /PackagePath:"C:\Program Files\Windows AIK\Tools\PETools\\WinPE_FPs\winpe-scripting_.cab"
For example, the US English language pack for the wmi-scripting.cab feature pack is wmi-scripting_en-us.cab.