Hi,
Now you can change comment title by customize. Please update the theme first.
Now please go customize ▸ Site blog settings ▸ Comments settings then you change comment title.
Thanks
(The update seemed clumsy. I downloaded the new version and after installation I had to refresh the fact that I wanted to use the CHILD theme. At first I thought the update had lost my information, but restoring the CHILD to “active” worked–everything came back.)