World income principle works the same, only it thethers you based on main area of presence, not nationality. A Turkish citizen mostly living in Germany (-> Ste

World income principle works the same, only it thethers you based on main area of presence, not nationality. A Turkish citizen mostly living in Germany (-> Steuerinländer), but working in France for a French company will pay German and French income taxes (and may get the French taxes back from Germany after handing in his tax forms next year). It's the same thing, only that nationality does not matter, residence does.