I returned language code in wp-config.php to the orginal
it was define(‘WPLANG’, ‘ar_SA’); now it’s define(‘WPLANG’, ‘ar’); after that I renamed the po file to ar.po rather than ar_SA.po and the blog theme works perfectly in RTL arabic
i figured it out, after change wp-config.php file and and make it like this
define(‘WPLANG’, ‘ar_SA’);
the translation file work good now but, the direction goes LTR rather than RTL :(
how could i make it RTL without change CSS file