instance method translate

# File activesupport/lib/active_support/vendor/i18n-0.4.1/i18n/backend/chain.rb, line 40
      def translate(locale, key, options = {})
        return key.map { |k| translate(locale, k, options) } if key.is_a?(Array)

        default = options.delete(:default)
        namespace = {}
        backends.each do |backend|
          begin
            options.update(:default => default) if default and backend == backends.last
            translation = backend.translate(locale, key, options)
            if namespace_lookup?(translation, options)
              namespace.update(translation)
            elsif !translation.nil?
              return translation
            end
          rescue MissingTranslationData
          end
        end
        return namespace unless namespace.empty?
        raise(I18n::MissingTranslationData.new(locale, key, options))
      end