Debug.Log(GetComponent<Greetings>().language = "English");

-> Hello there!

Hi there! Welcome to devRant :)
(Also yes, Unity is love)

I hate to be that guy but surely this just outputs "English" :P

@Jamoyjamie
/* Nah, I'm not sure. You could use a Property with a nice and shiny setter method! */

private string hello = "";
public string language { get (
return hello;
)
set (
switch (value) {
case "English":
hello = "Hello World";
break;
case default:
hello = "No language selected";
break;
});
}

@DrAddicted But in C# the value returned from the equals operator will be the value assigned, it's the same way the weird assigning while loop thingys work in C#, e.g.

while ((i = i - 1) != 0) { }