I think it depends on which scraper you use. The build in scraper doesn't care about countrys when using thegamesdb as source (because thegamesdb doesn't have multiple variations of covers).
Universal XML Scraper has that feature but i believe it depends on a setting in the tool what cover to scrape and not the filename. In UXS you can also select if you want plain gamenames or have (USA) etc included.
And i have no idea what sselphs can do.
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first