What are puzzle pieces?

Every time I look at my stream after I translated a sentense it shows that I got puzzle pieces. What are they for?

October 12, 2013

1 Comment

There used to be a counter to keep track of the number of translations (represented by the puzzle piece symbol) but that counter is no longer visible.

October 12, 2013
Learn a language in just 5 minutes a day. For free.