When can we expect Vietnamese to show up in the mobile version. And in particular the windows phone app.
In one of the discussions it was hinted that it would take a few weeks for the apps to be updated, but it is a little over 2 months now and I haven't seen any update yet.
The official statement says:
Once the kinks are resolved by having website users test the courses, we will add them to the apps.
Moreover, staff has to implement it into each app (different team inside Duo staff working on each app). So it takes longer for some apps and generally Windows app is the last one to have new features (as you can see here)
In any case, only staff may know about an estimated date (not even sure they do) ut they never communicate about it, so we just have to wait patiently.