As an example, the MMORPG "Elder Scrolls Online" [1], uses Lua as the interface and plugin ("addons") language. This allows feature-rich, very useful UI modifications such as "Bandits User Interface" [2]

[1] https://www.elderscrollsonline.com/

[2] https://www.esoui.com/downloads/info1643-BanditsUserInterfac...