From Ruby on Rails error message display to Japanese localization

class Post < ApplicationRecord
  belongs_to :user
	#Input is prohibited only in the content column. Set to allow input only up to 140 characters.
  validates :content, presence: true, length: { maximum: 140 }
end

<%= form_with model: @post, local: true,  html: {class: "form_area"} do |f| %>
        <div class="form_area__field">
					#In case of error layouts/error_Transition to messages,Pass an error message to the transition destination with the name object.
          <%= render 'layouts/error_messages',  object: f.object %>
          <%= f.text_area :content, id: "post_text", placeholder: "Enter the posted content", rows: 10 %>
            <div class="form_area__hidden_field">
              <%= hidden_field :post, :user_id, value: current_user.id %>
            </div>
            <div class="form_area__action">
              <%= f.submit "Post", class: "form_area__action__btn" %>
            </div>
        </div>

#Check if error is stored
<% if object.errors.any? %>
    <div class="vali_alert">
      <ul>
				#Get all error messages. Turn with each statement.
        <% object.errors.full_messages.each do |message| %>
          <li><%= message %></li>
        <% end %>
      </ul>
    </div>
  <% end %>

gem 'rails-i18n'

config.i18n.default_locale = :ja
config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]

ja:
  activerecord:
    attributes:
		#Model name you want to set in Japanese
      post:
		#Japanese that you want to correspond to the column name
        content: 'content'

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