Is it possible to change the meta box titles in the admin section?

Hi everyone,

I wondered if it is possible to be able to rename some of the meta box titles in the admin section, as the client I am making a website for needs to be able to understand more easily.

In particular, the title “Excerpt” needs to be changed to “Notes” to coincide with his previous site setup. I have searched through some of the admin page code, in various files but cannot find where I would change it. I don’t want to mess anything up, so if anyone knows how to do this safely, I would be grateful!

Thanks,
Michael