I assume this is an A/B test, but I really don't like it. It is much easier to translate from, in my case, German to English than it is to translate from English to German. This might give the false impression to Duolingo that this is a better way to learn as lessons are completed more quickly. However I find it less helpful than a 50/50 learned-language to native-language set of questions would be. It is quite hard to learn how to use any form of grammar if you don't get to practice it.