add Belarusian language

[StIvan8]

No description provided.

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[yoyo837]

rebase Pls.

[codecov]

Codecov Report

Merging #150 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #150   +/-   ##
=======================================
  Coverage   99.59%   99.59%           
=======================================
  Files          45       45           
  Lines        1999     1999           
  Branches      598      597    -1     
=======================================
  Hits         1991     1991           
  Misses          6        6           
  Partials        2        2           

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