public function getLanguageAbbr($iLanguage = null)
    {
        if ($this->_aLangAbbr === null) {
            $this->_aLangAbbr = $this->getLanguageIds();
        }

        $iLanguage = isset($iLanguage) ? (int) $iLanguage : $this->getBaseLanguage();
        if (isset($this->_aLangAbbr[$iLanguage])) {
            $iLanguage = $this->_aLangAbbr[$iLanguage];
        }

        return $iLanguage;
    }