I translated from Russian and I can say that the Russian version and the English one have some difference in the meaning.
Unfortunately my Turkish is too pure and it's not possible for me translate from Turkish
Ho fatto questo traduzione di russo.
KOLAY GELSÄ°N!=Удачного рабочего днÑ!=Buon lavoro!
Scusate mi tanto ma non credo che traduzione inglese è giusto per 100%
A proposito la traduzione in Bulgaro e uguale alla traduzione in Russo.
The expression "kolay gelsin" literally means "may it come easily", and it is most often used in work situations, when someone wants to express to someone else that they understand that what the other person is about to do or is already doing is difficult, and they want to express sympathy and hope it goes easily. That's why I thought "I hope it will go smoothly" was a brilliant translation, but it's very commonly used, and sometimes without much thought about the meaning, so I can see why someone would translate it as "Buon lavoro" too.