$query = "INSERT INTO `products`(`product_id`, `product_s_desc`, `product_desc`, `product_name`,
 `metadesc`, `metakey`, `customtitle`, `slug`) VALUES('".$id."', '', '', '".$name."', '', '', '', '".$Slug."',
 ON DUPLICATE KEY UPDATE slug=values(CONCAT('".$Slug."','".$s."')))";

1064You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version
 for the right syntax to use near 'ON DUPLICATE KEY UPDATE slug=CONCAT('sumochka-iz-tekstilya','1'))' at line 1

$query1 = "INSERT INTO `products_ru_ru`(`product_id`, `product_s_desc`, `product_desc`, 
`product_name`, `metadesc`, `metakey`, `customtitle`, `slug`) VALUES('".$id."', '', '', '".$name."', '', '', '', '".$Slug."') 
ON DUPLICATE KEY UPDATE `slug`=CONCAT('".$Slug."','".$s."')";