X shows where every account is based, but you can't filter your feed by it. Country Filter for X can. Tick a country or a whole region and posts and replies from accounts based there stop showing, or get blurred if you'd rather peek. Great for cutting engagement farms and reply spam. It tags every name with its location, counts what it filtered per place, and has an optional page for one-click blocking. Free, open source, no tracking: it only talks to x.com.