Idea about I18n edit in websites

i18n_gem.rb

class I18n
  method_alias_chain :translate, :helper

  DEFAULTMEHOPTIONS= {helper: true}

  def translate_with_helper key, options
    options = DEFAULTMEHOPTIONS.merge(options)

    txt = translate_without_helper key, options

    if not session[:translating]
      txt
    else
      if options[:helper]
        "<span class='translateable' data-key='#{key}'>#{txt}</span>"
      else
        txt += " (#{key})"
      end
    end

    txt
  end
end

view.rb

button_tag t(".is_it_nice", helper: false) #=> <button>It is nice (path.to.scope.it_is_nice)</button>
link_to t(".home") #=> <a> <span class='translateable' data-key='path.to.scope.home'>Home</span></a>