Is there any plan for filter according to country such as Chinese novel, Japanese novel and from other country
https://www.novelupdates.com/series-finder/?sf=1&org=496&sort=abc&order=asc if you mean on front page, then no. It has been asked before but tony has always said no to it.
You can make it visible using settings and search by origin using ddraigs link. I think the settings for origin are on the user profile page.