I just updated wpDisquz from 5.3.5 to 7.0.7 and it was a little difficult for me to make it work. I don't want to purge the entire cache form Cloudflare so I selectively purge the following CSS and javascript files. After several hard reloading on my browser, the comment translation started working. If the following files have new query string values, I think I could avoid the issue.
/wp-content/plugins/wpdiscuz-comment-translation/assets/css/comm-trns-style.min.css?ver=5.4.2 (This file was definitely causing the issue.)
/wp-content/plugins/wpdiscuz-comment-translation/assets/js/translate-script.min.js?ver=1.0.0 (possible issue?)
/wp-content/plugins/wpdiscuz/assets/css/wpdiscuz-combo.min.css?ver=5.4.2 (possible issue?)
Thank you for providing the wonderful addon!