Updated de_DE.lang, Closes #452

I am not sure about the hyphens in ll. 51-55, tell me your opinion.
Improvements thanks to @Robotic-Brain
Improvements thanks to @Robotic-Brain , again.
Update with good changes from #463, closes #463
Merge pull request #456 from Vexatos/patch-1

Updated de_DE.lang, Closes #452 and Closes #463