We have recently refreshed our branding across our offerings and changed the names of our pricing plans. If you have signed up before Aug 9, 2021, please click Previous plans to view your applicable plans.
We assure you that this change will not impact your product experience, and no action is required on your part.

You could navigate to Admin --> Account --> Helpdesk Settings --> Manage Languages and remove the Listed Support Languages from that page. This would remove multilingual support on your portal.

This would also delete the articles and email notifications that were created for each supported language.