GreaseMonkey/Tampermonkey script to substitute every occurrence of "fake news" with a more accurate description.

fakenews.js

// ==UserScript==
// @name         Grande Minchiata
// @namespace    http://juzam.net/
// @version      0.1
// @description  fake news = minchiate
// @author       juzam@juzam.net
// @match        http://*/*
// @include         *
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    
    var els = document.getElementsByTagName("*");
    for(var i = 0, l = els.length; i < l; i++) {
      var el = els[i];
        el.innerHTML = el.innerHTML.replace(/le fake news/gi, 'le minchiate');
        el.innerHTML = el.innerHTML.replace(/la fake news/gi, 'la minchiata');
        el.innerHTML = el.innerHTML.replace(/fake news fa/gi, 'minchiata');
        el.innerHTML = el.innerHTML.replace(/fake news/gi, 'minchiate');
    }

})();