Fix Japanese translations

[watarutmnh]

No description provided.

[codecov]

Codecov Report

Merging #4813 into develop will increase coverage by <.01%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #4813      +/-   ##
=============================================
+ Coverage       31.5%   31.51%   +<.01%     
  Complexity     12925    12925              
=============================================
  Files            530      530              
  Lines          38672    38672              
=============================================
+ Hits           12184    12186       +2     
+ Misses         26488    26486       -2

Impacted Files	Coverage Δ	Complexity Δ
src/services/Revisions.php	74.31% <0%> (+1.83%)	21% <0%> (ø)	⬇️

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[angrybrad]

Thank you!