My site language is non-English. Betheme has translated most parts. but some part are missed.
I want to translate "comments" in "comment section" from English to Persian.
This part comes from WordPress. If you would like to modify it, you will have to use some third-party plugin or modify the WP files.
But I cannot recommend any other plugins than those listed under the following link https://themeforest.net/item/betheme-responsive-multipurpose-wordpress-theme/7758048, and if you want to modify the files, you should contact your web developer.