EasyWords' development is still in progress...
So it is not the finished article. However it still looks worthy of investigation while it gets going.

Currently it can be set to ask questions to exercise your knowledge of Turkish of German in English, German or Turkish asking those questions continuously, every minute or every 2, 3, 4, 5, 7 minutes or every hour.

Also it can be paused not to ask a question for the next 10 minutes, 30 minutes or the next hour.

The answers can be set as multiple choice or written [complete the fill-in box]

You also can add a dictionaries.

It is supplied with MSI and EXE files but I have not been able to test the network install as yet.

Link: EasyWords

Licence: Freeware [but donations are welcomed]