Choo Choo Choo Choo Beep Beep
You're right! You don't have to be Japanese to sing retarded lyrics!
edit: Just wanted to add that I didn't have to look but one second for those lyrics - because they're how the deerhoof site is advertised - further proving my point that her retarded "cutesy" Japanese-accent riddled lyricism is a BIG part of the gimmick.