Some Turkish users use Google Translate
Fragment of a discussion from Support/LiquidThreads
Baran and Murat have lots of translations (1st and 3rd in this page). Even if they frequently use automated translation, there may be decent translations as well. Deleting all contributions may not be the best. If there is a way to review contributions from a specific user, then we can review them. Currently, Special:Contributions page is not suitable because I cannot see original sentence from there.