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    Kind people who are called programmers helped me here.
This code needs to be replaced in the files Utility.php, ajax_rating.php
 $tense = 1 == $count ? _MD_PUBLISHER_VOTE_VOTE : _MD_PUBLISHER_VOTE_VOTES; //plural form votes/vote  
with this one:
 // Change to define Russian word endings 
function getTense($n, $one, $two, $more) 
{ 
      $n = $n % 100; 
    if (10 < $n && 20 > $n) { 
        return $more; 
    } 
    $n = $n % 10; 
    if (1 == $n) { 
        return $one; 
    } 
    if (2 <= $n && 4 >= $n) { 
        return $two; 
    } 
    return $more; 
} 
$tense = getTense($count, _MD_PUBLISHER_VOTE_VOTE, _MD_PUBLISHER_VOTE_VOTES, _MD_PUBLISHER_VOTE_VOTESS); //plural form votes/vote  
I've already tested it. Everything works correctly.
1 голо
с2,3,4 голо
са5-20 голос
ов21 - голос
22,23,24 голоса
25-30 голосов
and further
There are still exceptions. They are also taken into account in this code.