Translations:Extension:TitleBlacklist/19/en

There is also a safe list at $1. The block list is applied first, then the safe list. So user input that matches an entry on the block list is blocked, except if it matches an entry on the safe list. You don't have to configure anything in LocalSettings.php in order to use the safe list. Some of the optional attributes listed above, for the block list, also work for the safe list, e.g. $2.