To use Google as a service, WebService::Google::Language worked for me.

#!/usr/bin/perl

use strict;
use warnings;
use WebService::Google::Language;
use Data::Dump qw(dump);

my $service = WebService::Google::Language->new(
    referer   => 'http://example.com',
    env_proxy => 0,
    src       => 'nl',
    dest      => 'en',
);

my $result = $service->translate("Hallo en tot ziens");
print dump($result);
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