At our local village pump at Turkish Wikipedia, we had a concurrence about adding the extension SandboxLink to Turkish Wikipedia (which can be found here https://tr.wikipedia.org/wiki/Vikipedi:Köy_çeşmesi_(teklifler)#Deneme_tahtası_yazısının_kişisel_araçlara_eklenmesi). If possible, please set the text of the link as "Deneme tahtası" and set the target page as "Kullanıcı:USERNAME/Deneme" .Thanks in advance.
Change 608799 had a related patch set uploaded (by Majavah; owner: Majavah):
[operations/mediawiki-config@master] Enable SandboxLink extension in trwiki
Thanks! However, it’ll take a bit longer for the translated messages to be deployed, so I suggest postponing this until next week, or possibly the week after. The new messages should be in the wmf.40 deployment branch, which should reach trwiki next Thursday (July 9), but I’m worried about how the extension will behave if the train has to be rolled back for some reason, so personally I’d probably wait even until the following Monday (July 13).