What comments are better to use for an online store?

Question

Disqus

Hello! There is a shop on OpenCart 3.0 CMS. Now we are moving to a new template, and we want to improve the Google PageSpeed ​​score. Previously, there is a Vkontakte comments widget, Google actively complains about it: the widget sits too cumbersome and heavy.
We peeped in the post https://habr.com/ru/post/446786/ an interesting solution commento.io. Inserted, measured - all is well.
There are nuances:
1. Is it possible to somehow Russify the module?
2. Is it possible to tweak Vkontakte authorization there?
The trouble is that our target audience is logged into Vkontakte. And earlier, when the Vkontakte comment widget was up, people willingly wrote comments. Now we are afraid that there will be no previous activity.
What would you advise to do in this situation?
I would be very grateful for answers to questions and advice on the situation.