didn't work for me, but my sister (owner of the PC and 1st week on linux!!!) found a solution.
1. Right click on panel 2. Add/Remove panel items 3. Add -> Keyboard layout handler 4. Right click on US flag -> Keyboard layout handler settings 5. Uncheck "Keep system layouts" 6. Keyboard layouts -> Add 7. Add keyboard layout "de" for Germany 8. Moved up keyboard layout "de" in the list of keyboard layouts 9. Success!!!
Btw: Will it be possible to upgrade directly from LXLE 12.04.4 to 14.04.x?