Change user interface in Jira Software so the label Sprint is changed to Release Cycle

Hello community,

We have modified our Jira Server instance interface so each and every tab/field/button/board action etc, called Sprint is now seen as Release cycle. We’ve done this with a custom made Jira add-on which does some kind of translation, defining each and every Sprint item display name. Information about this was previously found in, but such is no longer available there.
We’d like to make the same modification in our new Cloud instance however, the .jar addon for Server is not compatible with Cloud.
Any idea if this is achievable using Forge or Connect frameworks for Jira Cloud?

Thank you in advance!