It seem to work now... It get's coordinates even for the unexisting location like 'CorseMétéo'. However it still gives an error : "Useless use of string in void context at geoTest.pl line 27.". The code :

#!/usr/bin/perl -w
     
use strict;
use locale;
use warnings;
#use diagnostics;
use utf8;

binmode(STDIN, "encoding(utf8)");
binmode(STDOUT, "encoding(utf8)");
binmode(STDERR, "encoding(utf8)");

use Geo::Coder::Google;


my @place = ('Seattle', 'France', 'CorseMétéo', 'New Delhi');
my ($long, $lat);

foreach my $place(@place){
    my $geocoder = Geo::Coder::Google->new(apikey => '{MyAPIkeyHere}')
+;

    my $response;
    until (defined $response){
        eval{
            $response = $geocoder->geocode(location => $place);
            if ($@){
                "Couldn't get location : $place\n";
            }else{
                ($long, $lat) = @{ $response->{Point}{coordinates} };
            }
        }
        
    }
    print "$place\n";
    print "$long\n";
    print "$lat\n";        
}
[download]

Do you think it's a problem if I use the code even if it gives an error bu it works?