{
  "type": "object",
  "properties": {
    "$schema": {
      "type": "string"
    },
    "translations": {
      "propertyNames": {
    	"pattern": "^[a-zA-Z]{2}(_[a-zA-Z]{2})?$"
      },
      "additionalProperties": {
        "type": "object",
        "additionalProperties": {
          "type": "string"
        }
      }
    }
  },
  "additionalProperties": false
}