Next to the usernames it displays what languages you're learning and the level you're at. but what is the orange thing at the end??

[FrenchBalance]

thats your streak counter it tells you how many times you have studied and recived coins in a row vist http://duolingo.com/#/comment/371712 for more details.

[jnnyknx]

ohhh http://duolingo.com/#/comment/371712