如何在Ruby类/模块命名空间中翻译模型？

class Translator
  def self.translate(model)
    case model
    when 'User'
      '用户'
    when 'Post'
      '文章'
    else
      '未知模型'
    end
  end
end

class Model
  def initialize(name)
    @name = name
  end

  def translated_name
    Translator.translate(@name)
  end
end

user = Model.new('User')
puts user.translated_name # 输出：用户

post = Model.new('Post')
puts post.translated_name # 输出：文章

unknown = Model.new('Unknown')
puts unknown.translated_name # 输出：未知模型