Paperclip_i18n is a project mainly written in Ruby, it's free.
Adding I18n image upload support to paperclip plugin
Is an extension for the thoughtbot paperclip plugin to i18n support to file upload. Every language has a seperate file scope.
Add this line to your Gemfile
gem 'paranoid_i18n'
Bundle update in your console:
bundle update
You may want to run the generator for final touches (see next step).
There's a generator which creates the basic model, migration & controller for you:
rails g paperclip_i18n
rake db:migrate
You have to specify the controller in your config/routes.rb
resources :assets, :only=>[:show]