gistfile1.rb

#!/home/user1/.rvm/rubies/ruby-1.9.3-p194/bin/ruby

require 'hola/translator'

module Hola
  def hi(language = :english)
    translator = Translator.new(language)
    translator.hi
  end
end

include Hola
puts Hola::hi(:english)

lib/hola/translator.rb=>
class Translator
  def initialize(language)
    @language = language
  end

  def hi
    case @language
    when :spanish
      "hola mundo"
    else
      "hello world"
    end
  end
end

user1@mybox:~/tempgems/mygem/lib$ ruby -Ilib hola.rb
/home/user1/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- hola/translator (LoadError)
	from /home/user1/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
	from hola.rb:3:in `<main>'