public static function getCurrencySymbolFor($idsite)
    {
        $currencyCode = self::getCurrencyFor($idsite);
        $key = 'Intl_CurrencySymbol_' . $currencyCode;
        $symbol = Piwik::translate($key);

        if ($key === $symbol) {
            return $currencyCode;
        }

        return $symbol;
    }