protected function _getLangForNumberText($langCode = null) {
		if (!is_object($this->_NumberTextLib)) {
			return false;
		}
		$cachePath = 'lang_code_number_lib_' . md5(serialize(func_get_args()));
		$cached = Cache::read($cachePath, CAKE_THEME_CACHE_KEY_LANG_CODE);
		if (!empty($cached)) {
			return $cached;
		}

		$langNumb = $this->_Language->getLangForNumberText($langCode);
		$result = $this->_NumberTextLib->setLang($langNumb);
		Cache::write($cachePath, $result, CAKE_THEME_CACHE_KEY_LANG_CODE);

		return $result;
	}