We're using the Drupal language code for source/target language. This is a sane default for XLIFFs, but we should make it possible to alter it in the event that a different language/locale combination needs to be provided than the one specified by the Drupal language.
We're using the Drupal language code for source/target language. This is a sane default for XLIFFs, but we should make it possible to alter it in the event that a different language/locale combination needs to be provided than the one specified by the Drupal language.