Convert from zh-TW to zh-CN (Apache 2.0)

zhConvert.js

document.addEventListener("DOMContentLoaded", function () {
    var isSimplifiedChinese = function (lang) {
        var l = lang.toLowerCase();

        return l === "zh-cn" || l === "zh_zn" ||
            l === "zh-sg" || l === "zh_sg" ||
            l === "zh-hans" || l === "zh_hans" ||
            l === "zh";
    };

    var convertZh = function (selector) {
        var zhmap = TongWen_ts;
        let es = document.querySelectorAll(selector);

        for (let i = 0; i < es.length; i++) {
            es[i].innerHTML = es[i].innerHTML.replace(/[^\x00-\xFF]/g, function (s) {
                return s in zhmap ? zhmap[s] : s;
            });
        }
    };

    var lang = navigator.language || navigator.userLanguage;

    if (isSimplifiedChinese(lang)) {
        let elements = ["h1", "h2", "p", "li", "a"];
        for (let i = 0; i < elements.length; i++) {
            convertZh(elements[i]);
        }
    }
});