function defaultLocale(sFallbackLocale) {
		var sLocale;
		// use the current session locale, if available
		sLocale = Localization.getLanguage();
		sLocale = LanguageFallback.normalize(sLocale);
		// last fallback is fallbackLocale if no or no valid locale is given
		return sLocale || sFallbackLocale;
	}
Returns the default locale (the locale defined in UI5 configuration if available, else fallbackLocale).

@param {string} sFallbackLocale If the locale cannot be retrieved from the configuration
@returns {string} The default locale
@private