Multi-Language Custom Windows 11 Image

Hi,

I am trying to create a custom Windows 11 Image. I followed this page for most of my customizations : 

https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/oem-deployment-of-windows-desktop-editions?view=windows-11

Almost everything works fine in my online and offline modifications (adding drivers, custom apps, default settings, recovery, etc.). The only thing I haven't manage to achieve is adding multiple languages to a custom image.

What I do is :

1. Make offline modifications using DISM on my tech PC.
2. Apply this image to a SSD using WinPE.
3. Boot into that SSD and make online modifications using audit mode. (Generalize these modifications using sysprep)
4. Boot into WinPE again and capture that image.

When I apply that final captured image and boot into OOBE, when I switch between languages, the UI does not update. It stays in the default language. I have seen it works on many Dell PCs, but nothing seems to work on my side.

Do you have any insights on what I could be doing wrong? Is there missing information in the doc I linked above?

I tried adding the languages in the offline step, after the final capture, but the result is always the same.

Thank you,

Antoine