More sentences translating to learning language
I find that there aren't that many sentences where I have to translate a sentence from English - these are usually more difficult and I feel help me test myself better than translating into English. Does anyone know why there aren't very many sentences translating into the learning language?
This has been brought up countless times. Duo has done a great deal of testing and has determined how "difficult" it can make things before it begins to lose more users than it wants to lose.
You can try doing the reverse tree - they force you to translate sentences from English to your target language, and sometimes the other way too.