Code:

$phpdig_string_subst['iso-8859-1'] = 'A:A`ÁÂA~ÄA*,a:a`áâa~äa*,O:O`ÓÔO~Ö?,
                                          o:o`óôo~ö?,E:E`ÉE^Ë,e:e`ée^ë,C:Ç,c:ç,
                                             I:I`ÍÎI",i:i`íîi",U:U`ÚU^Ü,u:u`úu^ü,
                                               Y:Ý,y:y"ý,N:N~,n:n~';

$phpdig_words_chars['iso-8859-1'] = '[:alnum:]đţßµ';