I don't know specifically when (I noticed this only recently), but Duolingo has also introduced levels into the trophies. If all of the lessons in a particular skill tree are completed to the second level, the trophy becomes a level two trophy (a trophy with two crowns). If they're completed to the third level, it's a level three trophy, and so on. Last week (the 6th), I earned the level 2 trophy in Greek, and I'm close to earning a few others. One of the main purposes of creating this blog was to record when I levelled up in languages; since Duolingo replaced levels with this crown system, I guess the different level trophies are what I'll be tracking now.
