Rule of Newspeak is way of interpretation of statements in Newspeak and the translation into a native language.
In analogy, the same term can be applied to other languages too.
Term «Newspeak» is borrowed from utopia «Orwell1984». In that Utopia, Newspeak is invented with goal to make difficult the informational exchange and the logical analysis. In certain sense, the Newspeak is developed for the motivated reasoning, see also «Female logic».
The Rule of Newspeak appears as a way to transfer statements of motivated reasoning to area of applicability of the Bool algebra that is more suitable for the scientific analysis.
The Rule of Newspeak refers to semantics of statements expressed in Newspeak. At the first approach, all non-trivial statements of a message in Newspeak is negated, inverted.
The main idea of the Rule of Newspeak is shown in the cartoon at the top in a little bit exaggerated way; in order to perform some «TrumptyDumpty», to confuse the people the high rank official trains to replace the worlds with their antonyms.