How to make a view that lists otherwise Finnish nodes but if there exists an English translation for the node, list that instead?
Filter criteria would be logically "Language: if there is an English translation, then that, else Finnish".
So when all nodes are Finnish, the list of the node titles would be (these are ordinals in Finnish, just for the example):
And then someone adds a translation to the second and third one, the list would become:
Second <--- now links to the English translation of the node
Third <--- now links to the English translation of the node