Recently this has become pretty annoying in some cases : if I search the name of a sports team even though I mean something totally different, Google will start sending me notifications about that team. To make it worse, how to remove that team from your 'interests' is a bit convoluted.
I also have to go out of my way to make google understand that I am sometimes looking for a result in my native language (I live abroad).
Most of the time it is on point though. It does indeed seem that it taylors dev questions to the languages I use or more generally my interests.
If this kind of logic could be somehow stored on device instead of being something that Google (or Apple or whatever other company I don't have infinite trust in) owns, that would be a killer search product.
So for example, I might search for a class name and Googole will know what language / environment I'm working it, but I'll need to tell that to DDG when searching.