How does a player gain dual nationality?
1. The player is "born" with the dual nationality - i.e. they are pulled from the youth academy or allocated in a starting squad.
2. The player is eligible for dual nationality after 5 seasons playing in a different country with the same club. For example a Pakistan user purchases an Australian player from the transfer market. The player then plays 5 seasons with the team from Pakistan. The player is now eligible for dual nationality.
Once a player with dual nationality plays for any of the countries that they are eligible for, they will then take that country as their primary nationality and no longer be able to play for any other country.