Why can't the red dots in many neighboring countries disappear?

There is unread information. Official website, the data in the query, shows that the main reason why the red dots in many neighboring countries can't disappear is that there are still some unread information, which leads to the information being in the system all the time, and the red dots will disappear after reading the information. Multi-Neighborhood is a language learning tool software, which provides more than 40 language courses, including popular languages such as English, Japanese, Korean, French and Cantonese, as well as small and endangered languages such as Welsh and Navajo.