Hey !
Tbh I really do not know, but apparently the image is fine, here is a solution I got from Reddit :
Language adds are weird. Depending on how you're doing it, you probably need to MANUALLY re-add the latest LCU, like so:
Add-WindowsPackage -Online -PackagePath "$dirfiles\Updates\x64\LCU\Windows10.0-KB5021233-x64.cab" -IgnoreCheck -NoRestart -ErrorAction SilentlyContinue
Take the MSU. Extract it. Take the CAB. Apply it. Voila. That should fix it.Adding languages basically 'resets' a lot of stuff to like an old patch revision, and if you don't re-add the patch via the above method, those components never get patched, and you're basically broken.
I ended up trying to update windows using the « check online for windows update » feature and was able to get the LCU and solve the issue !