Hi, in the meantime I have found a solution:
1. Add this method in the plugin code: multilingual-text.php:
static function PostTitle($postTitle)
{
self::$title_multilingual = true;
if ( strlen($postTitle) == 0 ) return;
return $postTitle;;
//self::$title_multilingual = false;
}
2. Edit wp-includes\post-template.php -> function start_el(…) change this row from:
$output .= $indent . '<li class="' . $css_class . '"><a href="' . get_permalink($page->ID) . '">' . $link_before . apply_filters( 'the_title', $page->post_title, $page->ID ) . $link_after . '</a>';
to:
$output .= $indent . '<li class="' . $css_class . '"><a href="' . get_permalink($page->ID) . '">' . $link_before . apply_filters( 'the_title', Multilingual_Text::PostTitle($page->post_title), $page->ID ) . $link_after . '</a>';
And the problem is solved.
If someone has found a better solution, please let me know.
Bye