8 calls to user_preferred_langcode()

AccountFormController::form in drupal/core/modules/user/lib/Drupal/user/AccountFormController.php
Overrides Drupal\Core\Entity\EntityFormController::form().
EmailAction::execute in drupal/core/modules/action/lib/Drupal/action/Plugin/Action/EmailAction.php
Executes the plugin.
LocaleConfigSubscriber::configContext in drupal/core/modules/locale/lib/Drupal/locale/LocaleConfigSubscriber.php
Initializes configuration context with language.
MessageFormController::save in drupal/core/modules/contact/lib/Drupal/contact/MessageFormController.php
Overrides Drupal\Core\Entity\EntityFormController::save().
user_cancel_url in drupal/core/modules/user/user.module
Generates a URL to confirm an account cancellation request.
user_pass_reset_url in drupal/core/modules/user/user.module
Generates a unique URL for a user to login and reset their password.
_update_cron_notify in drupal/core/modules/update/update.fetch.inc
Performs any notifications that should be done once cron fetches new data.
_user_mail_notify in drupal/core/modules/user/user.module
Conditionally create and send a notification email when a certain operation happens on the given user account.