macOS Menus in Right to Left (RTL) in Arabic language

[satyam90]

I want some help to show menus in Right to Left for languages like Arabic or some other. For remaining languages, it must be Left to Right.
I want to write a utility or tweak to achieve this task. Can some body suggest me how to start with?

 

[larkost]

Does the localization system not already do what you want it to? I really don't know the answer, but often with this sort of thing APple has just done the right thing and it is already to go out of the box.

I know that NSTextArea can already handle this, but don't know about