Ticket #15248: allow-accents-in-slugs.php

<?php
/*
Plugin Name: Allow Accents in Slugs
Plugin URI: http://core.trac.wordpress.org/ticket/15248
Description: Allows to keep accented characters in post and term slugs.
Author: Sergey Biryukov
Author URI: http://profiles.wordpress.org/sergeybiryukov/
Version: 0.1
*/ 

function aas_restore_raw_title($title, $raw_title, $context) {
    return ( $context == 'save' ) ? $raw_title : $title;
}
add_filter('sanitize_title', 'aas_restore_raw_title', 9, 3);
?>