Or do you have other official lanuages
You mean apart from turkish, polish,russian and a few others :-P
O.k. if you really mean "official", there is a tiny minority in the far
eastern corner of Germany called "Sorben". Their language is something
like russian or czech (don't hit me if I'm wrong) and all streets are name
in german and sorbisch.
AFAIK the same goes with the danish minority in the north, but both
languages are not official to the point where they would be used in
local schools or so.