Translation issue in sessions

Thank you for reporting this problem. I had a look and it appears there is a few issues I will take care in the next plugin update.

In the meantime, you can try to add this code in the function.php of your child theme to patch things.

<?php 

// add a script to send language variables for ajax
add_action('sublanguage_init', function($sublanguage) {
  add_action('wp_footer', function() use ($sublanguage) {
    if (isset($sublanguage->current_language, $sublanguage->language_query_var)) {
      echo '<script>$.ajaxSetup({
        beforeSend: function (jqXHR, settings) {
          if (settings.type=="POST") {
            settings.data = (settings.data ? settings.data+"&" : "")+"'.$sublanguage->language_query_var.'='.$sublanguage->current_language->post_name.'";
          } else {
            settings.url += (settings.url.indexOf("?") > -1 ? "&" : "?")+"'.$sublanguage->language_query_var.'='.$sublanguage->current_language->post_name.'";
          }
        }
      });</script>';
    }
  });
});

// correct some interoperability issues between Khore theme and Sublanguage
if (defined('DOING_AJAX') && DOING_AJAX) {
  add_filter('posts_fields', function($sql, $wp_query) {
    global $wpdb;
    if (empty($wp_query->query_vars['post_type']) || $wp_query->query_vars['post_type'] !== "session") {
      $sql = str_replace(", $wpdb->postmeta.meta_value as time, mt1.meta_value as date" , '', $sql);
    }
    return $sql;
  }, 11, 2);
  add_filter('posts_orderby', function($sql, $wp_query) {
    global $wpdb;
    if (empty($wp_query->query_vars['post_type']) || $wp_query->query_vars['post_type'] !== "session") {
      $sql = str_replace("mt1.meta_value ASC, $wpdb->postmeta.meta_value ASC" , '', $sql);
    }
    return $sql;
  }, 11, 2);
  add_action('init', function() {
    global $sublanguage_admin;
    add_filter('home_url', array($sublanguage_admin,'translate_home_url'), 10, 4);
  });
}