In order to create a translation for the Access Denied Message, you will need to create a wpml-config.xml file and put it inside your site』s /wp-content/plugins/woocommerce-wholesale-order-form/ root folder.
Please copy the code below and save it as wpml-config.xml
Afterward, you should be able to create a translation for the Access Denied Message using WPML by following the steps below:
First, create the translation for the order form page
Go to WPML > Theme and plugins localization
Select WooCommerce Wholesale Order Form under String in the plugins
Click Scan selected plugins for strings
Go to WPML > String Translation
Choose the selection in Select strings within domain
Choose admin_texts_wwof_permissions_noaccess_title for the title translation and later after saving choose admin_texts_wwof_permissions_noaccess_message for the message translation
Click 「translations」 in the list (on the right)
Put the translation for the other languages there
Enable *Translation is complete*
Click Save
It should now show the correct translation when you switch language in your site』s front end.