You add several languages to a base image and utilize that image for deploying the Session Hosts. Users log in but don’t have an option to add additional languages. Which of the following steps would you take?

Answer options:

A.Update the Inbox Apps for multi-language.
B.Create a content repository for language packs.
C.Run Set-WinUserLanguageList cmdlet to add the language list to the settings menu.
D.Create a content repository for features on demand.
E.None of these.

Correct Answer: C 
To make your users select the languages you installed, sign in as the user, and then run the below PowerShell cmdlet for adding the installed language packs to the Languages menu. Also, this script can be set up as a logon script or an automated task that activates when the users sign in to their session. 

Option A is incorrect. This task is needed to build the base image, before the session host deployment.
Option B is incorrect. A content repository should be created for language packs before deploying the session hosts.
Option C is correct. Running Set-WinUserLanguageList cmdlet to add the language list to the settings menu is the right option.
Option D is incorrect. Creating a content repository for features on-demand, won’t meet the goal.
Option E is incorrect. You need to run Set-WinUserLanguageList cmdlet as mentioned in the explanation.
Reference: 
To know more about adding language packs to a Windows 10 multi-session image, please visit the below-given link: 

https://docs.microsoft.com/en-us/azure/virtual-desktop/language-packs?WT.mc_id=AZ-MVP-5004159#enable-languages-in-windows-settings-app