Rules:
I have one word which has several (2 or more) meanings
Each of the meanings is a teapot (first, second ...)
Try to figure out the word with my hints.
First hint:
My first teapot controls
My second teapot controls too
My third teapot controls nothing
Second hint:
My first teapot can be written,or can be fluent
My second teapot must be written
My third teapot should be written
Third hint:
My first teapot is in any Language
My second teapot is in some languages
My third teapot is in any combination of it's languages
Final hint:
My first teapot is enforced by the chief
My second teapot is enforced by a machine
My third teapot can't be enforced
Good luck and have fun :)
last riddle