I recommend listening to DJ Earworm's mashup of the top song across the world [0] to hear a greater variety of countries, albeit for this or last year.
In fairness to this post, they probably posted as much as they could get easily and consistently. I feel like the same situation reigns for country history in book shops. When I go to a used book store in Queens, New York, I'm not apt to find any books about Jaipur, India. But, if I were to go to Mumbai, India, I could probably find something. So, maybe we should prevail upon or sponsor people in Africa to volunteer their lists.
The interface also allow to comment, post and interact with the original HN platform. Credentials are stored locally and are never sent to any server, you can check the source code here: https://github.com/GabrielePicco/hacker-news-rich.