change the related post

Hey,

That phrase comes as a default phrase for related posts. You may try using language translation plugins to overwrite that phrase.

Good Day,
Best Regards.

Thank you Sabina.
Or can I find this article related sentence in the theme editor for the changed?

Hey,

I am afraid there is no options for this. You can change it in a different language(your site language) using language translation plugins.

Good Day,
Best Regards.