core/homeassistant/components/fan/strings.json

{
  "device_automation": {
    "trigger_type": {
      "turned_on": "{entity_name} turned on",
      "turned_off": "{entity_name} turned off"
    },
    "action_type": {
      "turn_on": "Turn on {entity_name}",
      "turn_off": "Turn off {entity_name}"
    }
  }
}