You cannot find the language pack from the in-game menu. You must go to the console dashboard.
Which is your PlayStation Network account registered to? The Witcher 3 Arabic Language Pack Ps4
The Witcher 3: Wild Hunt is an action role-playing game developed by CD Projekt RED. It was released in 2015 and has since become one of the most popular and critically acclaimed games of all time. You cannot find the language pack from the in-game menu