# ./foo.pl 
use strict;
use warnings;

use lib ('/path_to_Word_pm');
use Word;

my $word = Word->new();
$word->set('apple','it');

# ./Word.pm
package Word;

use strict;
use warnings;
use base 'WordExposed::Languages';

sub new {
    my $class = shift;
    my $self  = {};
    bless($self, $class);
    return $self;
}
sub set {
    my $self = shift();
    my $english = shift();
    my $language = shift();
    $self->{english} = $english;
    $self->{language} = $language;
    $self->_translate();
}
1;

# ./WordExposed/Languages.pm
package WordExposed::Languages;

use WordExposed::LanguagesPrivate::French;
use WordExposed::LanguagesPrivate::Italian;

sub _translate {
    my $self = shift();
    if ($self->{language} eq 'fr') {
        $self->_traduction();
    } elsif ($self->{language} eq 'it') {
        $self->_traduzione();
    }
}

1;

# ./WordExposed/LanguagesPrivate/French.pm
package WordExposed::LanguagesPrivate::French;

our @ISA       = qw(Exporter);
our @EXPORT    = qw( _traducion );
our @EXPORT_OK = qw();

sub _traducion {
    my $self = shift();
    warn 'pomme' if ($self->{english} eq 'apple');
}
1;

# ./WordExposed/LanguagesPrivate/Italian.pm
package WordExposed::LanguagesPrivate::Italian;

our @ISA       = qw(Exporter);
our @EXPORT    = qw( _traduzione );
our @EXPORT_OK = qw();

sub _traduzione {
    my $self = shift();
    warn 'mela' if ($self->{english} eq 'apple');
}
1;