I have seen Chinese last names on American flagged players. A few times, I see a name I'd call American under a foreign flag. Since each nation has a seperate database, I guess BB cares something about seperate nationalities. Maybe this reflects foreign players imported into other nations, such as Yao Ming to the NBA, American players to Philippines and Europe, and European players also to the NBA.
Not exactly: Yao Ming was, is and will be a Chinese citizen no matter where he plays...
BB tries to to take into account the actual population variety of each country. And allthough the Dutch names database consists for 100% out of typical Dutch names, the names list that is actually used when generating players isn't: There are a lot of Dutch citizens whose parents and/or grandparents were form Al Magrib, Turkey, Indonesia, China and many other countries, so they might have very "exotic" names. This is shown by using a small % of those countries names databases for the "Dutch" names list.