The help item says this about word censorship:
Word Censorship scans text for 'bad words' from a pre-defined list. Each language pack has its own default list, but you can define your own. To define your own list enter the settings page and specify your list of words. The user will see the words obscured with a black block, although mousing over will pop up the original word.
It doesn't seem to show the original word anymore. Should this be updated?