core/homeassistant/components/dsmr_reader/strings.json

{
  "config": {
    "abort": {
      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
    },
    "step": {
      "confirm": {
        "description": "Make sure to configure the 'split topic' data sources in DSMR Reader."
      }
    }
  }
}