danish alphabet :)?
Try this snippet from perllocale

print "\n-------------------\n";
use locale;
print +(sort grep /\w/, map { chr } 0..255), "\n";
print "\n-------------------\n";
no locale;
print +(sort grep /\w/, map { chr } 0..255), "\n";
print "\n-------------------\n";
__END__
no locale : ABCDEFGHIJKLabcdefghijkl
POSIX     : ABCDEFGHIJKLabcdefghijkl
use locale: aAbBcCdDeEfFgGhHiIjJkKlL
no locale : Laa aaa aab aba abb lab 
POSIX     : Laa aaa aab aba abb lab 
use locale: aaa aab aba abb Laa lab 
-------------------
_µ01¹2²3³456789aAªáÁàÀâÂäÄãÃåÅæÆbBcCçÇdDðÐeEéÉèÈêÊëËfFƒgGhHiIíÍìÌîÎïÏj
+JkKlLmMnNñÑoOºóÓòÒôÔöÖõÕøØœŒpPqQrRsSšŠßtTþÞuUúÚùÙûÛüÜvVwWxXyYýÝÿŸzZžŽ

-------------------
0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz

-------------------
[download]

It has something to do with LC_COLLATE :)