Private module methods in Ruby

I think the best way (and mostly how existing libs are written) to do this is by creating a class within the module that deals with all the logic, and the module just provides a convenient method, e.g.

module GTranslate
  class Translator
    def perform(text)
      translate(text)
    end

    private

    def translate(text)
      # do some private stuff here
    end
  end

  def self.translate(text)
    t = Translator.new
    t.perform(text)
  end
end