d6_system_maintenance_translation.yml

id: d6_system_maintenance_translation
label: Maintenance page configuration
migration_tags:
  - Drupal 6
source:
  plugin: variable_translation
  variables:
    - site_offline_message
  source_module: i18n
process:
  langcode: language
  message: site_offline_message
destination:
  plugin: config
  config_name: system.maintenance
  translations: true