I saw a few complaints about people getting a Spanish error message when playing Lego Rock Band. I didn't have any issues with the game until last night when my internet wasn't working. I took this video to show the problems I was having.
(can someone translate this message?)
The video shows that it continually happens.
If you have DLC and try to play this game offline you can't do it. When you choose a DLC or are forced into a DLC song in a mystery setlist the game glitches out and is impossible to play. If you get the error message it kicks you back to the band select screen.
Things I've noticed while offline:
1 - All LRB songs work fine
2 - Some DLC songs will work (Take Me Out and one of the Rush songs work)
3 - Setlists will glitch out in the middle of playing it if a song that doesn't work is in the middle of the set.
4 - Quickplay is also affected (I guess you could go through and figure out every song that's affected, but I'm not putting that kind of time into this issue)