How to localize an error message on a form object

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Is it possible in Rails 7 to localize the attributes in a form object including ActiveModel::Model?

I have the following

class  ProductionDataForm
  include ActiveModel::Model

  attr_accessor :monitorable_type

  validates :monitorable_type,  presence: true
end

And when monitorable_type is missing, I’d like to display Post can't be blank instead of Monitorable type can't be blank.

So, as I do for objects inheriting from ApplicationRecord, I tried to define

en:
  activerecord:
    attributes:
      production_data_form:
        monitorable_type: "post"

But is not working.

class ProductionDataForm
  include ActiveModel::Model
  include ActiveModel::Attributes
  attribute :monitorable_type, :string # ?
  validates :monitorable_type, presence: true
end

en:
  activemodel:
    attributes:
      production_data_form:
        monitorable_type: "post"

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