Ask HN: How can my website auto-set trending words for each country?

I have a side project, an open-source website (podfind.xyz), which I use to "quickly see the opinions of podcasters on certain topics," such as "Israel."

Considering users might be unsure what to search for when they first visit, I want to automatically update keywords based on trending topics in different countries. However, as a foreigner, I'm unaware of the current hot topics in countries like Japan, France, or Spain. Is there a method to let the website automatically gather trending events from various countries and simplify them into recommended keywords?

I've considered using Google News or Google Trends, but the top-ranked results often don't align with the keywords that genuinely interest people. I'm uncertain about the best approach.