The reason I'm asking is that this change coincided with a recent update of my phone to Android 5.0, but I suppose it might just be normal behaviour once you reach a certain level in Duolingo.

Here's an example: http://i.imgur.com/Cbhsf7N.png

I'm just presented with some images and have to write the answer in Spanish. Previously, I think these questions always included the English word for the thing you were expected to translate. As you can see I got this one wrong because I guessed they were trying to depict 'winter', but in fact they were depicting 'dawn'.