csgo cannot check whether it is a national server or an international server, but we can change the national server or international server in steam, as shown below

1. First log in to steam and click Click where the red mark points, as shown in the picture.

2. An option will pop up, click on the properties, as shown in the picture.

2. Click to set startup items, as shown in the figure.

3. Enter -worldwide in the box and click OK, then click to start the game. You will find that you have switched to the international server.

4. If you want to switch to the national server, delete the text in the box and click OK to switch back.