eca-1.0.x-dev/modules/language/config/schema/eca_language.schema.yml

eca.event.plugin.eca_language:negotiate:
  type: eca.event.plugin
  label: 'ECA language negotiation'

action.configuration.eca_get_current_langcode:
  type: mapping
  label: 'Configuration for the "Get Current Langcode" action'
  mapping:
    token_name:
      type: required_label
      label: 'Name of token'

action.configuration.eca_set_current_langcode:
  type: mapping
  label: 'Configuration for the "Set Current Langcode" action'
  mapping:
    langcode:
      type: string
      label: 'Language'
      constraints:
        Choice:
          callback: '\Drupal\eca\Validation\EcaConstraintCallbacks::getAllValidLangcodes'