将WordPress设置为RTL语言，然后在中使用以下代码functions.php 或作为插件：

<?php
add_filter( \'locale\', \'my_set_admin_locale\' );

function my_set_admin_locale( $locale ) {

    // check if you are in the Admin area
    if( is_admin() ) {
        // set LTR locale
        $locale = \'en_US\';
    }

    return( $locale );
}

    if( ! is_admin() ) { // not admin area
        // set RTL locale
        $locale = \'ar\';
    }

Like so :

add_filter(\'locale\', function ($locale) {

    global $wp_locale;

    if (isset($_COOKIE[\'farsi\'])) {
        $wp_locale->text_direction = \'rtl\';
        return \'fa_IR\';

    } else {
        $wp_locale->text_direction = \'ltr\';
        return \'en_US\';
    }

});