Hello and sorry for ma bad english.

I just installed a Joomlart template with K2 inside. On the demo of this template  : templates.joomlart.com/ja_cloris/index.php?option=com_k2&view=item&id=4:best-of-the-web&Itemid=74

There is a comment system.

Is it from K2 ? and if it is not, is K2 has a integrate comment system ?

In the K2 panel, i have enable comment for anybody, but i don't see any forms in the frontend.

 

thanks

They use JA Comment Component. K2 has also its own comment system though. To enable it you will need to also do so to the category parameters of the item.