[Plugin: WordPress SEO by Yoast] focus keyword should accent non-english characters patch

admin/ajax.php

preg_match_all( '/suggestion data="([^"]+)"\/>/', $result['body'], $matches);
        foreach ($matches[1] as $key => $match) {
                $new_str='';
                for ($i = 0; $i < strlen($match); $i++) {
                        $code=ord($match[$i]);
                        $new_str .= ($code > 127) ? '&#'.$code.';' : $match[$i];
                }
                $matches[1][$key] = html_entity_decode($new_str,0,"UTF-8");
        }
        echo json_encode( $matches[1] );

http://wordpress.org/extend/plugins/wordpress-seo/