Editing artwork for food packaging product

We're currently developing a new range of products that require some existing artwork designs to be tweaked. Most just need some text added to them regarding products being compostable. Something like;

'100% compostable. The container is special. The paper used to make it is sustainably sourced and it has a unique starch-based lining making it completely compostable'

Please see examples of the attached artworks we require adding text to communicate the products as compostable. The 'I00771-BROWN' is an example with the compostable text that already has the compostable text and we would like the plain designs to have something similar.