Add Language button is missing

I’m trying to add a new language to the application(brave browser - windows) but when I go to settings/additional-settings/language the button ‘Add language’ is not there like this guide shows https://support.brave.com/hc/en-us/articles/360017901232-How-do-I-change-my-language-

  1. go to settings/additional-settings/language
  2. the button ‘Add language’ is missing

Version 1.24.85 Chromium: 90.0.4430.212 (Official Build) (64-bit)