Sometimes no sound
Some of the setences in some lessons (japanese from english) dont play any sound at all. Its like there is no data to be pulled. There is the little repeat sound button but it does nothing. Hovering over the individual words does produce a sound but of course is not often the right reading of the word in this context. Sometimes its even a listening test where you hear nothing and can only click on "i cant do this now" or so. So maybe its just not yet fully implemented or is this a bug?