Add lang de

[matheo-2001]

German lang added

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6bde2b2) 96.80% compared to head (442d000) 96.80%.
Report is 1 commits behind head on v3.0.

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Additional details and impacted files

@@            Coverage Diff            @@
##               v3.0     #610   +/-   ##
=========================================
  Coverage     96.80%   96.80%           
  Complexity      266      266           
=========================================
  Files            34       34           
  Lines          1126     1126           
=========================================
  Hits           1090     1090           
  Misses           36       36           

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