Because the German Amiga keyboard has one extra key to the right of the backspace key, with the | and \ symbols printed on it a German PC keyboard does not have. The key does not exist. On the Amiga keyboard, it is cut off from the backspace key which has only half the size of its PC equivalent. Hence, you cannot type backspaces on UAE, neither pipes.
What they didn't keep it over the years?
Some Swedish keyboards still have it, even my mechanical QPAD MK80 has it! (love that keyboard, uses blue switches)
