perl -e '
use warnings;
use strict;
use utf8;

my $veiði     = "exciting";
my $efnisskrá = "repertoir";

use open IO => qw{:utf8 :std};
print "in my $efnisskrá (efnisskrá) I like to go fishing ($veiði)\n";
'
in my repertoir (efnisskrá) I like to go fishing (exciting)