This is a gem for Rails to easily change and iterate over languages defined in I18n.available_locales.
The most useful command should be language_switcher helper, which add a div and ul to allow to see an element in several different languages.
I also recommend using some tabbing with js, such as Jquery tabs:
$(document).ready(function(){ $('[data-tabs]').tabs(); });
language and each_language are also useful methods.
This is a pretty simple plugin, but i started to use the same set of methods in several projects and decided to make it a gem.