My company prefers to control the addition of new dictionary items in the Translation tab to our team. Ideally, we would like to be able to restrict access to that button dependent on the role the back office user holds, letting our clients edit these translations instead. Is this currently possible?

You can add user groups that doesn't allow to see the Translation section and allocate users to that group. But this way Translation section won't be visible to them so they can't change it. Another user group to allow the section so those users can see them. Would this work for you?

https://docs.umbraco.com/umbraco-cms/extending/section-trees/trees One of the notifications should allow you to remove the menu item or action permission if it uses it

@Busra and @Matt Wise thanks for your responses. Currently we have a second translation section featuring a duplicate of the existing section minus the create functionality. However this would be easier to manage long-term if we had a way to restrict permissions for who could create dictionary items in the single existing section. Restricting access to the section based on a user role wouldn’t work unfortunately since currently if you have access to the section, you can create an item by default. We just want to allow the admin group to create, and another to edit. I’ll have to look more into notifications, as potentially that sounds as though it can achieve what we are looking for.