core/homeassistant/components/alert/strings.json

{
  "title": "Alert",
  "entity_component": {
    "_": {
      "name": "[%key:component::alert::title%]",
      "state": {
        "idle": "[%key:common::state::idle%]",
        "off": "Acknowledged",
        "on": "[%key:common::state::active%]"
      }
    }
  }
}