ha-core/homeassistant/components/lock/strings.json

{
  "device_automation": {
    "action_type": {
      "lock": "Lock {entity_name}",
      "open": "Open {entity_name}",
      "unlock": "Unlock {entity_name}"
    },
    "condition_type": {
      "is_locked": "{entity_name} is locked",
      "is_unlocked": "{entity_name} is unlocked"
    },
    "trigger_type": {
      "locked": "{entity_name} locked",
      "unlocked": "{entity_name} unlocked"
    }
  }
}