If you want to change the ‘Related Post’ and ‘Recent Posts’ text for this you need to follow the below steps:
You will find this option in the WordPress Dashboard -> Navigate to AMP Option panel -> Settings -> Translation Panel -> Edit ‘Related Post’ and ‘Recent Post’ text after that click on the “Save Changes” button.

Scroll down a little to see this option
In these fields, you can edit “Related post” or “Recent Posts” text here.

The Output of the edit change the ‘Related Post’ & ‘Recent Posts’ text

That’s it for this tutorial!
We hope it helped you. If you have any feedback or questions, then please share them in the comments section below.