EDIT

#5911 and CdmDataportalMultilingual describe how to add and update a translation file.

• Actually the drush command does not work.

katja@ubuntu:/var/www/drupal-7-cdm-dataportal/web$ drush php-eval "locale_system_update(array('cdm_dataportal'));drush_backend_batch_process();"

PHP Fatal error:  Uncaught Error: Call to undefined function cache_get() in /var/www/drupal-7-cdm-dataportal/web/includes/module.inc:762
Stack trace:
#0 /var/www/drupal-7-cdm-dataportal/web/includes/module.inc(962): module_implements()
#1 /var/www/drupal-7-cdm-dataportal/web/modules/system/system.module(2522): module_invoke_all()
#2 /var/www/drupal-7-cdm-dataportal/web/includes/theme.inc(798): _system_rebuild_theme_data()
#3 /var/www/drupal-7-cdm-dataportal/web/includes/theme.maintenance.inc(57): list_themes()
#4 /var/www/drupal-7-cdm-dataportal/web/includes/bootstrap.inc(2945): _drupal_maintenance_theme()
#5 /var/www/drupal-7-cdm-dataportal/web/includes/errors.inc(177): drupal_maintenance_theme()
#6 /var/www/drupal-7-cdm-dataportal/web/includes/bootstrap.inc(2670): _drupal_log_error()
#7 [internal function]: _drupal_exception_handler()
#8 {main}
  thrown in /var/www/drupal-7-cdm-dataportal/web/includes/module.inc on line 762
Drush command terminated abnormally due to an unrecoverable error.                                                                                                                              [error]
Error: Uncaught Error: Call to undefined function cache_get() in /var/www/drupal-7-cdm-dataportal/web/includes/module.inc:762
Stack trace:
#0 /var/www/drupal-7-cdm-dataportal/web/includes/module.inc(962): module_implements()
#1 /var/www/drupal-7-cdm-dataportal/web/modules/system/system.module(2522): module_invoke_all()
#2 /var/www/drupal-7-cdm-dataportal/web/includes/theme.inc(798): _system_rebuild_theme_data()
#3 /var/www/drupal-7-cdm-dataportal/web/includes/theme.maintenance.inc(57): list_themes()
#4 /var/www/drupal-7-cdm-dataportal/web/includes/bootstrap.inc(2945): _drupal_maintenance_theme()
#5 /var/www/drupal-7-cdm-dataportal/web/includes/errors.inc(177): drupal_maintenance_theme()
#6 /var/www/drupal-7-cdm-dataportal/web/includes/bootstrap.inc(2670): _drupal_log_error()
#7 [internal function]: _drupal_exception_handler()
#8 {main}
  thrown in /var/www/drupal-7-cdm-dataportal/web/includes/module.inc, line 762

• The extraction described in #5911 is not available in actual portals.

• a really critical issue is the handling of the strings below the search fields in the advanced search view.

  • the translation is added correctly, but sometimes a new string is added whithout translation, the screenshot shows the same string three times

But there is another way to update the translations: Upload the file from the admin UI.