With drupal we can enable the locale module and install the i18n module to internationalise and translate our site we can make our hands dirty by visiting the http://build2be.com/admin/build/translate/search.

Still our work is not finished yet. We have to dive into settings.php to translate more strings of our site.

Taken from http://drupal.org/node/275705#comment-1058360 and using http://drupal.org/projects/drush_sm we learn we may choose from a lot of variables.