Alternatively you could write a function that returns the message:

use MyMsg; # exports get_message.
my $msg = get_message( 'cracker' );
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This way you could build goodies into the function that allows clever stuff to happen - such as checking which language to return the message in - not to mention croaking if you ask for a message that does not exist.

It would also make sense to store your messages centrally in an XML or YAML file as suggested above.