仮に、WordPress の WP Discourse フォーラムを Discourse Standard（月額 100 ドル）に移行することは可能でしょうか？よろしくお願いいたします。
Any Discourse forum can be migrated to official hosting, as described on our hosting page.
Thank you very much for your reply 
Just to be clear. You’re using something like bbpress or some other WordPress forum plugin?
There is no such thing as a wp-discourse plugin forum. With the wp-discourse plugin you have a Discourse site and a WordPress site that are connected together. If you were to move to standard hosting, you’d likely still want the wordpress site.
ご説明ありがとうございます。ということは、Discourseフォーラムを自分のWordpressサイトに接続するには、Discourse Standardプランを購入する必要があるということですね？
Not necessarily. You could self-host but if you’d prefer a hosted plan then yes, the WP integration will work on our Standard plan.