core/homeassistant/components/aemet/translations/bg.json

{
    "config": {
        "error": {
            "invalid_api_key": "\u041d\u0435\u0432\u0430\u043b\u0438\u0434\u0435\u043d API \u043a\u043b\u044e\u0447"
        },
        "step": {
            "user": {
                "data": {
                    "api_key": "API \u043a\u043b\u044e\u0447"
                }
            }
        }
    }
}