Manual:$wgRecentChangesFlags

Details
Allow modification of flags on Special:RecentChanges, Special:Watchlist and Special:RecentChangesLinked.


 * The 'letter' key is a message, which is used as text of the  .


 * The 'title' key is a message, which is used as title attribute of the  .


 * The optional 'class' key allows to set a CSS class different than the flag name.


 * The optional 'grouping' key allows to set how top-level flag is determined.
 * 'any' will set the top-level flag if any line contains the flag.
 * 'all' will only be set if all lines contain the flag.