Now when adding a word to the dictionary, LibreOffice just adds the word, without forcing the user to choose dictionaries. Going back to Star Office, there were usually two dictionaries by default and the choice of which to add a word to seemed arbitrary. Then for the past few years, the default configuration had just one dictionary, but still forced the user to choose the only choice. Now, with just one choice, LibreOffice assumes the only choice is the one the user wants. Yes. Keep the common case fast.
It's still not a very good dictionary application, being hopelessly bad at offering possible corrections. Ispell is very good. No other dictionary comes close.