core/homeassistant/components/timer/strings.json

{
  "entity_component": {
    "_": {
      "name": "Timer",
      "state": {
        "active": "[%key:common::state::active%]",
        "idle": "[%key:common::state::idle%]",
        "paused": "[%key:common::state::paused%]"
      }
    }
  }
}