Contrived recipe for a blog post.

recipe.rb

gem "i18n-js", git: "https://github.com/gabrielg/i18n-js.git"

append_file 'app/assets/javascripts/application.js' do <<-JS
//= require i18n
//= require i18n/translations
JS
end

inject_into_file 'config/application.rb', after: "Rails::Application" do <<-RUBY

    config.i18n.load_path += Dir[Rails.root.join('config', 'locales', '**', '*.{rb,yml}').to_s]
RUBY
end

LOCALES = %w[en-US es-AR en-AU hr pl ru ko]

run 'mkdir config/locales/views config/locales/models'

LOCALES.each do |locale|
  translation_data = <<-"FILE"
#{locale}:
  hello: hello world from #{locale}
FILE

  create_file "config/locales/views/#{locale}.yml", translation_data
  create_file "config/locales/models/#{locale}.yml", translation_data
end