Where did drush language-add disappear? I was using it for a long time in the install script and today it stopped working and I don't remember changing anything related.


  The drush command 'language-add' could not be found.


Was it part of l10n_update (I have it enabled), drush itself or something else?

This https://drupal.org/project/drush_language is not what I'm looking for. It doesn't work and I've never seen it before.
The problem is caused by not installing drush_language in the correct directory.
If you stil have the problem:

First remove anything related to drush_language:


Go to your drupal folder and do drush pmu drush_language
Go to /drupal/sites/all/modules and delete the directory drush_language, if it's there.
check your system for a global drush_language: e.g. do updatedb &amp; locate drush_language. Then delete any folders called drush_language.
Go back to your drupal root folder an do: drush dl drush_language --destination=./sites/all/modules/