core/homeassistant/components/sms/strings.json

{
  "config": {
    "step": {
      "user": {
        "title": "Connect to the modem",
        "data": { "device": "Device" }
      }
    },
    "error": {
      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
      "unknown": "[%key:common::config_flow::error::unknown%]"
    },
    "abort": {
      "already_configured": "[%key:common::config_flow::abort::already_configured_device%]",
      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
    }
  }
}