Thanks for your help as always. It seems as though I am the only one who has the problem.
Location was set when I installed the app years ago. It still appears to be set now. I thought it might have something to do with Android 11, but the problem was happening before the upgrade.
So I just reinstalled it and the foreign articles are still there. When I try to open it, it's a YouTube video.
It seems strange that I'm the only one reporting this problem. It's certainly not a huge problem but annoying to have to scroll past these articles.
I just noticed that these articles are all ADS.