proc = lambda { |n| n % 10 == 1 && n % 100 != 11 ? :one : [2, 3, 4].include?(n % 10) && ![12, 13, 14].include?(n % 100) ? :few : n % 10 == 0 || [5, 6, 7, 8, 9].include?(n % 10) || [11, 12, 13, 14].include?(n % 100) ? :many : :other }

{
  :ru => {:i18n => {:plural => { :rule => proc, :keys => [:one, :few, :many, :other]}}},
  :uk => {:i18n => {:plural => { :rule => proc, :keys => [:one, :few, :many, :other]}}}
}