Is there a common root like eleu- behind both proelefsi and eleftheria?
Yes, ελεύθερος seems to have the same root as έλευση=coming,arrival. This common root dates back to proto-indo-european, though.
Troll1995, am i guessing it right that the same root is present in the name of the city Ελευδίνα?
I wrote here "this is the origin of the elephant" and it was marked as wrong?
It seems to be accepted in the incubator. You are definitely right...
Ok, problem found. The Τ in This was the Greek one, not the latin, so it was considered another word completely. It's solved now!
As Troll says this is in the incubator. If you can tell us which section you found this in it would help: the Tree, Strengthen skills, multiple choice, etc. Thank yoy.
I believe that it happened when I chose "strenghen skills". It was marked wrong but no mistake was underlined in red (the usual behaviour when you get something wrong), that's why I thought it odd.