How do I customize the "Book Source" section text?

Hello.
How do I customize the “Book Source” section text on self hosted Pressbooks. There is an existing book and I want to translate it to another language. So I cloned the book and currently translating it. But on the main page in the “Book Source” section it says:
This book is a cloned version of ...
I want to change that text as:
This book is the English version of ...
Where can I change it? I also have database access.