With Windows 10, version 1803, we started to deliver language translation improvements via Local Experience Packs, also referred to as LXPs. Local Experience Packs are AppX packages delivered via the Microsoft Store that enable users to experience Windows features like the Start Menu, Settings, and File Explorer in the language of their choice. We also continued to support cabinet file-based language packs (lp.cab) and Language Interface Packs (LIPs) via language pack ISO files distributed with Windows 10.
Beginning with the next major release of Windows 10, we are going to support LIPs as Local Experience Packs only. There will no longer be any lp.cab files for LIP. Local Experience Packs are faster to install and have a smaller operating system (OS) footprint. If you create Windows images with LIP, you will have to add the corresponding LXP for that LIP. For full languages, there is no change and you will continue to use the corresponding lp.cab.
You can start testing Windows image creation using LXPs using Windows 10 Build 17723 or higher EEAP builds. We are providing LXP AppX packages and their corresponding licenses for all 72 LIPs in the language pack ISOs.
The process will work like this. First, you will need to use the Add-ProvisionedAppXPackage cmdlet to add a Local Experience Pack to your Windows 10 image. Once you have added the Local Experience Pack to your image, you should see the following behavior.
The LXP will show up on the language selection screen of the out-of-box experience (OOBE).
When you select the LXP, all subsequent screens of the OOBE will be in the corresponding language. Since the LXP has only a subset of operating system strings available, some of the content in OOBE may fall back to the base language. This is on parity with current behavior.
The first login experience post-OOBE should be in the selected language.