Add Japanese (ja) translation.

[ghost]

What does this implement/fix? Please describe.

• Add Japanese (ja) translation.

Does this close any currently open issues?

• No.

Additional context

• There is none.

Where has this been tested?

• No.

[codecov[bot]]

Codecov Report

Merging #319 (92a0535) into feature (04f946a) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff             @@
##             feature     #319   +/-   ##
==========================================
  Coverage      91.21%   91.21%           
  Complexity       864      864           
==========================================
  Files            126      126           
  Lines           2196     2196           
  Branches         221      221           
==========================================
  Hits            2003     2003           
  Misses            71       71           
  Partials         122      122           

[VREMSoftwareDevelopment]

Thanks