function getLanguageAsSetOnThePage(sLang) {
		if (sLang) {
			return new Locale(sLang).toString();
		}

		return new Locale(Localization.getLanguageTag()).toString();
	}
The <code>lang</code> attribute of the closest parent determines the behavior of the native hyphenation.
Typically this is the HTML tag and its value can be read with the <code>getLocale</code> function.

@param {string} [sLang=module:sap/base/i18n/Localization.getLanguageTag().toString()] The language to get. If left empty - the global application language will be returned
@returns {string} The language code
@private