I'm using Mobile 34.0.0. When I select a word in a book, the pop-up menu now shows that word with back and forward buttons. The buttons simply select the previous or next words. Maybe I'm missing something, but I'm baffled as to the purpose of this. It doesn't make selecting a word easier. It DOES take up valuable screen space. I find it quite annoying and would prefer it be removed.
To me, this seems to be another instance of adding a feature for the sake of adding features. Please prioritize improving existing features before adding new ones.