As a result of our community discussion, please add the following namespace aliases to trwikisource
'+trwikisource' => [ 'T' => NS_TALK, 'K' => NS_USER, 'VK' => NS_PROJECT, 'WS' => NS_PROJECT, 'Ş' => NS_TEMPLATE, 'Y' => NS_HELP, 'KAT' => NS_CATEGORY, 'P' => 200, ],