core/homeassistant/components/vacuum/strings.json

{
  "device_automation": {
    "trigger_type": {
      "cleaning": "{entity_name} started cleaning",
      "docked": "{entity_name} docked"
    },
    "action_type": {
      "clean": "Let {entity_name} clean",
      "dock": "Let {entity_name} return to the dock"
    }
  }
}