Used in Special:Preferences, first tab, in the Internationalisation section. This may be customized for other languages. This should sound like a question, the answer to which can be selected in one of these:
- ("When mentioning you, the software will use gender neutral words whenever possible")
- ("He edits wiki pages")
- ("She edits wiki pages")
The idea is that this preference is used for speaking to the user and about the user, and the label and the preference are supposed to demonstrate it.