[MC-16144] Server doesn't translate strings

It's just like this in the console:

2013-05-23 15:53:50 [INFO] multiplayer.player.joined
2013-05-23 15:54:11 [INFO] chat.type.admin
2013-05-23 15:57:38 [INFO] chat.type.text
2013-05-23 15:57:39 [INFO] chat.type.text
2013-05-23 15:58:46 [INFO] chat.type.admin
2013-05-23 15:59:30 [INFO] chat.type.admin
2013-05-23 15:59:31 [INFO] xPaw lost connection: disconnect.quitting
2013-05-23 15:59:31 [INFO] multiplayer.player.left