Nationality refers to the flag displayed beside your name on the leaderboard.
How it works[]
At the top-right corner of the screen, there is a Leaderboard visible which displays the top 10 Players with the highest Experience and one more row containing your own Name if you are not top 10.
There are flags next to each name on the Leaderboard. This flag is determined by the language your browser is set.
For example, if your browser is displaying US English, you will show up with a US flag on the Leaderboard.
Changing Region[]
The flag can be changed by changing the language of your browser.