That seems a fairly flawed design. I think it’s decent to have people flag the languages they’re most likely to post in for the convenience of others. But automatically hiding posts that don’t match your language specification by default is just going to be confusing and counterproductive. I just recently noticed that mine had been set to English and had seen post recommending not to do that etc. But noticed similar as well. Now a lot of my own old posts are not even showing to me. How does this make sense? Is anything undefined should be shown to everyone and have nothing hidden because it isn’t defined.