An example is the image below, where there's no Malay in the webpage. Instead of clicking 'Nope' (which can have many meanings, as far as feedback is concerned), I would rather click 'Wrong suggestion!' button to make the system learn, or to merely build a log of pages where the feature malfunctions.
When I used the work feedback in this post, I refer to the following classic feedback model.
Ideal feedback model (source)