Please add fillter for localized page url slugs in future versions of sf pro plugin.

Something like this:

--- a/public/includes/class-search-filter-query.php
+++ b/public/includes/class-search-filter-query.php
@@ -1160,10 +1160,10 @@
                {
                        $sf_page_no = (int)$url_args['paged'];
                }
-               else if($this->has_url_var($url, "page")) //check to see if this is different for different langs
+               else if($this->has_url_var($url, apply_filters('sf_page_url_slug', 'page'))) //check to see if this is different for different langs
                {//try to get page number from permalink url

-                       $sf_page_no = (int)$this->get_url_var($url, "page");
+                       $sf_page_no = (int)$this->get_url_var($url, apply_filters('sf_page_url_slug', 'page'));
                }
                else if(isset($url_args['sf_paged']))
                {