Www-translate-apertium is a project mainly written in Perl, it's free.
Open source machine translation
Apertium is an open source machine translation engine. This module provides an OO interface to the Apertium online machine translation engine.
perl 5.8
To install this module type the following:
perl Makefile.PL make make test make install
In Windows systems, use nmake or dmake instead.
This module requires these other modules and libraries:
WWWW::Mechanize 1.20 or higher
Copyright (C) 2006 by Enrique Nell.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.