Per T173070, InitializeSettings.php now starts with:
'wgNamespaceAliases' => [ // defaults to aid when things are switched // Set default aliases for project_talk for all projects // T173070 '+wikibooks' => [ 'Wikibooks' => NS_PROJECT, 'Wikibooks_talk' => NS_PROJECT_TALK, ], '+wikinews' => [ 'Wikinews' => NS_PROJECT, 'Wikinews_talk' => NS_PROJECT_TALK, ], '+wikiquote' => [ 'Wikiquote' => NS_PROJECT, 'Wikiquote_talk' => NS_PROJECT_TALK, ], '+wikisource' => [ 'Wikisource' => NS_PROJECT, 'Wikisource_talk' => NS_PROJECT_TALK, ], '+wikiversity' => [ 'Wikiversity' => NS_PROJECT, 'Wikiversity_talk' => NS_PROJECT_TALK, ], '+wikipedia' => [ 'Wikipedia' => NS_PROJECT, 'Wikipedia_talk' => NS_PROJECT_TALK, ], '+wiktionary' => [ 'Wiktionary' => NS_PROJECT, 'Wiktionary_talk' => NS_PROJECT_TALK, ], '+wikivoyage' => [ 'Wikivoyage' => NS_PROJECT, 'Wikivoyage_talk' => NS_PROJECT_TALK, 'WV' => NS_PROJECT, ],
However, a number of wikis had individually set Project_talk aliases identical to those added for the groups, and these should be removes for code readability and general cleanup. Example:
'+azwikiquote' => [ 'Wikiquote_talk' => NS_PROJECT_TALK, ],
Additionally, other general cleanup for identical aliases can be done. Eg, the following can be removed:
'+abwiki' => [ 'Wikipedia' => NS_PROJECT, ],
because "Wikipedia" is an alias for NS_PROJECT by default.