Move vi_VI to vi_VN and update some translations

[hungneox]

Fixes #

Changes proposed in this pull request:

• Move folder vi_VI to vi_VN, this is the proper locale name for Vietnamese
• Update some missing translations

[codecov-commenter]

Codecov Report

Merging #215 (c7428bf) into master (50df672) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #215   +/-   ##
=======================================
  Coverage   99.68%   99.68%           
=======================================
  Files           9        9           
  Lines         632      632           
=======================================
  Hits          630      630           
  Misses          2        2           

Flag	Coverage Δ
GHA_Ubuntu	98.41% <ø> (ø)
GHA_Windows	98.10% <ø> (ø)
GHA_macOS	98.41% <ø> (ø)

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[hugovk]

Hi Hung! Thanks!