diff --git a/class-OutputUtilities.php b/class-OutputUtilities.php
index af34319..51e0fd1 100644
--- a/class-OutputUtilities.php
+++ b/class-OutputUtilities.php
@@ -1,252 +1,255 @@
 <?php
 # Copyright (C) 2015, 2016, 2017, 2019, 2020, 2021 Valerio Bozzolan
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
  * Collection of utilities
  */
 class OutputUtilities {
 
 	/**
 	 * Generate a slug
 	 *
 	 * @param string $s Input string e.g. 'what the hell'
 	 * @param int $max_length Max. length limit
 	 * @param string $glue Slug glue
 	 * @param bool $truncated Flag to indicate if the string was truncated by the $max_length limit
 	 * @return 'something-as-this'
 	 */
 	public static function slug( $s, $max_length = 0, $glue = '-', & $truncated ) {
 		$truncated = false;
 
-		// normalize accents (frequent in Italian)
-		$s = strtolower( self::stripAccents($s) );
+		// lowercase
+		$s = strtolower( $s );
 
-		// normalize cyrillic (go Ukraina! go!)
+		// normalize cyrillic (go Ukraina! go!) - should be done before accents normalization
 		$s = self::cyrillic2latin( $s );
 
+		// normalize accents (frequent in Italian)
+		$s = self::stripAccents( $s );
+
 		if( $glue !== '_' ) {
 			$s = str_replace( '_',' ', $s );
 		}
 		$glue_safe = preg_quote( $glue );
 		$s = preg_replace( "/[^a-z0-9\s\\$glue_safe]/", '',  $s );
 		$s = preg_replace( "/[\s\\$glue_safe]+/",       ' ', $s );
 		$s = trim( $s, ' ' );
 		if( $max_length ) {
 			$len = strlen( $s );
 			$s = substr( $s, 0, $max_length );
 			$truncated = $len !== strlen( $s );
 		}
 		$s = preg_replace( '/\s/', $glue, $s );
 		return rtrim( $s, $glue );
 	}
 
 	/**
 	 * Enfatize a substring
 	 *
 	 * The input string is automatically sanitized.
 	 *
 	 * @param  string $s    Heystack
 	 * @param  string $q    Needle, probably the direct user input
 	 * @param  string $pre  HTML before query (bold tag as default)
 	 * @param  string $post HTML after query (bold tag as default)
 	 * @return string       Enfatized string HTML-escaped
 	 */
 	public static function enfatizeSubstr( $s, $q, $pre = '<b>', $post = '</b>' ) {
 
 		$q_length = mb_strlen( $q );
 		$s_length = mb_strlen( $s );
 
 		// no needle? that's quick
 		if( empty( $q_length ) ) {
 			return esc_html( $s );
 		}
 
 		$out = '';
 		$offset = 0;
 		do {
 			// find occurrence
 			$pos = mb_stripos( $s, $q, $offset );
 			$match = $pos !== false;
 			if( $match ) {
 
 				// pre-query
 				$pre_found = mb_substr( $s, $offset, $pos - $offset );
 				$pre_found = esc_html( $pre_found );
 				$out .= $pre_found;
 
 				// enfatize found query
 				$found = mb_substr( $s, $pos, $q_length );
 				$found_length = mb_strlen( $found );
 				$enfatized = $pre . esc_html( $found ) . $post;
 				$out .= $enfatized;
 
 				// do not process again this part
 				$offset = $pos + $found_length;
 			} else {
 				$end = mb_substr( $s, $offset );
 				$end = esc_html( $end );
 				$out .= $end;
 
 				$offset = $s_length;
 			}
 
 		} while( $offset < $s_length );
 
 		return $out;
 	}
 
 	/**
 	 * Compress some data
 	 *
 	 * To optimize data-transfer, falsy values are unset.
 	 *
 	 * @param string $data
 	 * @return mixed
 	 */
 	public static function compressData( $data ) {
 		$is_array = is_array( $data );
 		if( $is_array || is_object( $data ) ) {
 			foreach( $data as $k => $v ) {
 				if( is_array( $v ) || is_object( $v ) ) {
 					if( $is_array ) {
 						$data[ $k ] = static::compressData( $v );
 					} else {
 						// call JsonSerialize() prematurely (or it may break ->get() methods)
 						if( $v instanceof JsonSerializable ) {
 							$v = $v->jsonSerialize();
 						}
 
 						$data->{ $k } = static::compressData( $v );
 					}
 				} elseif( $v === null || $v === false ) {
 					if( $is_array ) {
 						unset( $data[ $k ] );
 					} else {
 						unset( $data->{ $k } );
 					}
 				}
 	   		}
 		}
 		return $data;
 	}
 
 	/**
 	 * Get the human filesize from bytes
 	 *
 	 * @param $filesize int Size in bytes
 	 * @param $glue string
 	 * @param $round int Round
 	 * @return string
 	 */
 	public static function humanFilesize( $filesize, $glue = ' ', $round = 2 ){
 		if( !is_numeric( $filesize ) ) {
 			return __( "NaN" );
 		}
 		$decr = 1024;
 		$step = 0;
 		$prefixes = [ 'B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB' ];
 		$n = count( $prefixes ) - 1;
 		while( $filesize / $decr > 0.9 && $step < $n ) {
 			$filesize /= $decr;
 			$step++;
 		}
 		return round( $filesize, $round ) . $glue . $prefixes[ $step ];
 	}
 
 	/**
 	 * Strip accents.
 	 *
 	 * @param $s string
 	 * @return string
 	 */
 	public static function stripAccents( $s ) {
 		$a = ['À','Á','Â','Ã','Ä','Å','Æ', 'Ç','È','É','Ê','Ë','Ì','Í','Î','Ï','Ð','Ñ','Ò','Ó','Ô','Õ','Ö','Ø','Ù','Ú','Û','Ü','Ý','ß','à','á','â','ã','ä','å','æ', 'ç','è','é','ê','ë','ì','í','î','ï','ñ','ò','ó','ô','õ','ö','ø','ù','ú','û','ü','ý','ÿ','Ā','ā','Ă','ă','Ą','ą','Ć','ć','Ĉ','ĉ','Ċ','ċ','Č','č','Ď','ď','Đ','đ','Ē','ē','Ĕ','ĕ','Ė','ė','Ę','ę','Ě','ě','Ĝ','ĝ','Ğ','ğ','Ġ','ġ','Ģ','ģ','Ĥ','ĥ','Ħ','ħ','Ĩ','ĩ','Ī','ī','Ĭ','ĭ','Į','į','İ','ı','IJ', 'ij', 'Ĵ','ĵ','Ķ','ķ','Ĺ','ĺ','Ļ','ļ','Ľ','ľ','Ŀ','ŀ','Ł','ł','Ń','ń','Ņ','ņ','Ň','ň','ʼn','Ō','ō','Ŏ','ŏ','Ő','ő','Œ', 'œ', 'Ŕ','ŕ','Ŗ','ŗ','Ř','ř','Ś','ś','Ŝ','ŝ','Ş','ş','Š','š','Ţ','ţ','Ť','ť','Ŧ','ŧ','Ũ','ũ','Ū','ū','Ŭ','ŭ','Ů','ů','Ű','ű','Ų','ų','Ŵ','ŵ','Ŷ','ŷ','Ÿ','Ź','ź','Ż','ż','Ž','ž','ſ','ƒ','Ơ','ơ','Ư','ư','Ǎ','ǎ','Ǐ','ǐ','Ǒ','ǒ','Ǔ','ǔ','Ǖ','ǖ','Ǘ','ǘ','Ǚ','ǚ','Ǜ','ǜ','Ǻ','ǻ','Ǽ', 'ǽ', 'Ǿ','ǿ','Ά','ά','Έ','έ','Ό','ό','Ώ','ώ','Ί','ί','ϊ','ΐ','Ύ','ύ','ϋ','ΰ','Ή','ή'];
 		$b = ['A','A','A','A','A','A','AE','C','E','E','E','E','I','I','I','I','D','N','O','O','O','O','O','O','U','U','U','U','Y','s','a','a','a','a','a','a','ae','c','e','e','e','e','i','i','i','i','n','o','o','o','o','o','o','u','u','u','u','y','y','A','a','A','a','A','a','C','c','C','c','C','c','C','c','D','d','D','d','E','e','E','e','E','e','E','e','E','e','G','g','G','g','G','g','G','g','H','h','H','h','I','i','I','i','I','i','I','i','I','i','IJ','ij','J','j','K','k','L','l','L','l','L','l','L','l','l','l','N','n','N','n','N','n','n','O','o','O','o','O','o','OE','oe','R','r','R','r','R','r','S','s','S','s','S','s','S','s','T','t','T','t','T','t','U','u','U','u','U','u','U','u','U','u','U','u','W','w','Y','y','Y','Z','z','Z','z','Z','z','s','f','O','o','U','u','A','a','I','i','O','o','U','u','U','u','U','u','U','u','U','u','A','a','AE','ae','O','o','Α','α','Ε','ε','Ο','ο','Ω','ω','Ι','ι','ι','ι','Υ','υ','υ','υ','Η','η'];
 		return str_replace( $a, $b, $s );
 	}
 
 	/**
 	 * Convert a cyrillic string to latin
 	 *
 	 * https://stackoverflow.com/a/7461449
 	 *
 	 * Go Ukraine! Go!
 	 *
 	 * @param string $s
 	 * @return string
 	 */
 	public static function cyrillic2latin( $s ) {
 		$cyr = ['Љ', 'Њ', 'Џ', 'џ', 'ш','ђ','ч','ћ','ж','љ', 'њ', 'Ш','Ђ','Ч','Ћ','Ж','Ц','ц','а','б','в','г','д','е','ё', 'ж', 'з','и','й','к','л','м','н','о','п','р','с','т','у','ф','х','ц', 'ч', 'ш', 'щ',  'ъ','ы','ь','э','ю', 'я',  'А','Б','В','Г','Д','Е','Ё', 'Ж', 'З','И','Й','К','Л','М','Н','О','П','Р','С','Т','У','Ф','Х','Ц', 'Ч', 'Ш', 'Щ',  'Ъ','Ы','Ь','Э','Ю', 'Я',  'ї' ];
 		$lat = ['Lj','Nj','Dž','dž','š','đ','č','ć','ž','lj','nj','Š','Đ','Č','Ć','Ž','C','c','a','b','v','g','d','e','io','zh','z','i','y','k','l','m','n','o','p','r','s','t','u','f','h','ts','ch','sh','sht','a','i','y','e','yu','ya', 'A','B','V','G','D','E','Io','Zh','Z','I','Y','K','L','M','N','O','P','R','S','T','U','F','H','Ts','Ch','Sh','Sht','A','I','Y','e','Yu','Ya', 'i'];
 		return str_replace( $cyr, $lat, $s );
 	}
 
 	/**
 	 * Spawn the white screen of death
 	 *
 	 * @param $msg string
 	 */
 	public static function WSOD( $msg ) {
 		self::header503();
 		?>
 		<!DOCTYPE html>
 		<html>
 		<head>
 			<title><?= __("Errore") ?></title>
 			<meta http-equiv="Content-Type" content="text/html; charset=<?php echo CHARSET ?>" />
 			<meta name="robots" content="noindex, nofollow" />
 		</head>
 		<body>
 			<h1><?php printf(
 				__("Ci dispiace! C'è qualche piccolo problema tecnico! (DEBUG: %s)"),
 				DEBUG ? __("sì") : __("no")
 			) ?></h1>
 			<?php self::error( $msg ) ?>
 			<p><?= __("Potrebbe essere utile comunicarci questo problema affinchè non si ripresenti in futuro. Grazie per la collaborazione.") ?></p>
 		</body>
 		</html>
 		<?php
 		exit( 1 );
 	}
 
 	/**
 	 * A shitty phrase logged in the syslog and eventually printed when DEBUG
 	 *
 	 * @param $msg string
 	 * @return void
 	 */
 	public static function error( $msg ) {
 		error_log( "$msg from {$_SERVER['SCRIPT_FILENAME']}" );
 		if( DEBUG ) {
 			echo "\n<!-- ERROR: -->\n";
 			echo '<p style="color:red;">' . esc_html( $msg ) . '</p>';
 		}
 	}
 
 	/**
 	 * Send HTTP 503 headers
 	 */
 	public static function header503() {
 		if( headers_sent() ) {
 			error( 'cannot send headers if there is earlier output' );
 		} else {
 			header( 'HTTP/1.1 503 Service Temporarily Unavailable' );
 			header( 'Status: 503 Service Temporarily Unavailable' );
 			header( 'Retry-After: 300' );
 		}
 	}
 
 }