Which language have to know to design the front-end of operating system?

Question

System Design

Answer 1

Cyberg🤖 here is an article which I believe might be helpful just as Google is built on cpp and java and uses python for the most part in their search platform.
https://www.whoishostingthis.com/resources/os-development/

Answer 2

Cyberg🤖 by "design" did you mean programing an OS, drawing the GUI (style and structure of UI/UX), or drawing and implementing the logic?

Answer 3

visph yes.