[Rails] [Rails 3.2] How to extend a gem model

I am using the gem  'acts-as-taggable-on' ( mbleigh) and I need to extend the Tag model to  translate the tag name with Globalize

How can I add  "translates :name" into ActsAsTaggableOn::Tag ?  I can fork the gem and modify my version, but is there any way to do it simply with "extend ActiveSupport::Concern"  ?

currently :

module ActsAsTaggableOn
  class Tag < ::ActiveRecord::Base
    include ActsAsTaggableOn::Utils

    attr_accessible :name

needed :
 module ActsAsTaggableOn
  class Tag < ::ActiveRecord::Base
    include ActsAsTaggableOn::Utils

    attr_accessible :name
    translate :name

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