fix: improved et locale

[Tarinu]

🔎 Overview

Basically the same as #3579 but for v4. In addition I also added messages for default and url. It should cover all available rules now.

[codecov-commenter]

Codecov Report

Merging #3584 (40855ac) into main (f84c619) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #3584   +/-   ##
=======================================
  Coverage   96.33%   96.33%           
=======================================
  Files          68       68           
  Lines        1827     1827           
  Branches      457      457           
=======================================
  Hits         1760     1760           
  Misses         67       67           

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[logaretm]

Awesome, many thanks!