def get_country_name_from_iso_code(data_dict, country_code):
    """
    Returns the Passport-statndard coutnry name from a given country code (fast)

    :param data_dict: Dictionary containing mappy of ISO-2 country codes to country names
    :param country_code: the country code (two characters capitalized)
    :return: The country name if found, otherwise the original country code (string)
    """
    try:
        country_nm = data_dict[str(country_code)]
        return str(country_nm)
    except:
        return str(country_code)