Hi Taosd,have a look here
Language Packs
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...www.ntlite.com
powershell -nop -ep bypass "$List = Get-WinUserLanguageList; $List.Add("fr-FR"); $List.Add("de-DE"); Set-WinUserLanguageList -LanguageList $List -Force"
Thank you @Garlie.There are two steps in adding new language support:
1. Integrate LP's into image. Apply all languages BEFORE adding any monthly updates.
2. Create the language preferences for EACH user. The installed LP's are available to all users, but not everyone wants to have the same languages for their user account.
Run this PowerShell command from Post-Setup (User):
Code:powershell -nop -ep bypass "$List = Get-WinUserLanguageList; $List.Add("fr-FR"); $List.Add("de-DE"); Set-WinUserLanguageList -LanguageList $List -Force"
Replace $List.Add() with your extra languages.
powershell -nop -ep bypass "$List = Get-WinUserLanguageList; $List.Add('fr-FR'); $List.Add('de-DE'); Set-WinUserLanguageList -LanguageList $List -Force"