function getElementLanguage(el, pLang) {
                if (el.lang && typeof el.lang === "string") {
                    return el.lang.toLowerCase();
                } else if (pLang && pLang !== "") {
                    return pLang.toLowerCase();
                }
                return getLang(el, true);
            }
Get Language of Element or of one of its ancestors.
@param {Object} el The element to scan
@param {string} pLang The language of the parent element
@returns {string} the language