rails_locale_fixer.rb

require 'yaml'

en_hash = YAML::load_file(File.expand_path('../config/locales/en.yml', File.dirname(__FILE__)))

locales = %w(en de es fr nl pt-BR zh-CN zh-TW)

def fix_locale(locale_hash, en_hash)
  
  result_hash = locale_hash
  
  en_hash.each do |k, v|
    
    # populating missing key/value
    unless result_hash.has_key?(k)
      result_hash[k] = v
    end
    
    # going deeper
    if v.is_a?(Hash)
      result_hash[k] = fix_locale(result_hash[k], v)
    end
    
    result_hash = result_hash.sort_by{|k, v| [v.is_a?(Hash).to_s, k]}.to_h
  end
  
  result_hash
end

locales.each do |locale|
  locale_hash = YAML::load_file(File.expand_path("../config/locales/#{locale}.yml", File.dirname(__FILE__)))
  
  result_hash = { }
  result_hash[locale] = fix_locale(locale_hash[locale], en_hash['en'])
  
  File.open(File.expand_path("../config/locales/#{locale}_fix.yml", File.dirname(__FILE__)), 'w') do |f| 
    f.write result_hash.to_yaml(line_width: 1000)
  end
end