My headlines get each word capitalized

I think this comes from your theme CSS code. Please leave some URL to allow us debug the CSS.

This is not wpDiscuz addon issue, this CSS code comes from the theme or form other plugin. Please navigate to Dashboard > Comments > Settings > Styling admin page, put this CSS code in Custom CSS Code textarea, save it, delete all caches and do Ctrl+F5 on front-end:

#widget-comments-container .wpdiscuz-widget-comment .wpdiscuz-widget-comment-content p.wpdiscuz-widget-comment-title {
 text-transform: none!important;
}

This does not work

https://

www.footbik.by

Hi,

I have a few more problems

I want to remove it or translate it into Russian:

I did not find a way to translate COMMENTS

and I also have to change the background:

Thanks