The Data::Dumper output is correct, but it is showing the escaped characters - for example \x{f4} is the "latin small letter o with circumflex".

I suggest you try printing to a file like this:

open my $in, "<:encoding(UTF-8)", "in_file.csv"
    or die "in_file.csv $!";
my $aoh = csv( in => $in );
close $in;

open my $out, ">:encoding(UTF-8)", "out_file.txt"
    or die "out_file.txt $!";
for my $hash (@$aoh) {
    while (my($key,$val) = each %$hash) {
        print $out "$key => $val\n";
    }
}
close $out;
[download]