In regards to Shemaforash and Goliath playing for Team Germany:
This is an issue that was brought up in NC 2012 (http://forums.taleworlds.com/index.php/topic,213458.msg5223901.html#msg5223901) but never addressed. This is a new issue that hasn't been considered in any previous NCs (at least outside of PMs). I reviewed IOC and FIFA rules, and IOC is much more lenient, basically giving the country with the biggest Olympic budget the best players. FIFA changed their rules recently, and have a very restrictive eleigibility requirement in order to keep a competitive environment, and uses the unfortunate argument of trying to prevent every European team from fielding 18 Brazilians in twenty years. While reviewing these rules is important in understanding what decisions have been made for international leagues in the past, Warband Nations Cup is it's own tournament with it's own quirks and politics.
So the dilemma was whether or not to allow Germany (or any country) to recruit from outside its borders. The rules already determined that a team must be comprised of one nationality where possible. Germany quite obviously could field a team with all German members; in fact, there is a statement in the NC 2013 threads that Germany could field 12 teams with their active players. It is quite possible that Germany currently has the largest selection of active players in Warband. Why is the country with the largest representation fielding players outside of it's country?
It is apparent that Germany wants a winning team. Shemaforash and Goliath are known to be some of the best cavalry in the world. Allowing Germany to create a team with the best players will set a precedent for every other team to do the same. It is not a stretch of the imagination to see NC turn into three competitive teams with players from all over the world, and 15 teams that may or may not join the tournament just to lose. In order to prevent this scenario, the tournament admins decided to deny Shemaforash and Goliath eligibility to compete with the German team. It is impossible, and undesirable, to try to make NC a fair tournament. I think it is in the interest of the tournament and the community to not allow teams to form for NC that contain players from all over the world and have the capability to sweep the tournament.
In regards to Team BeNe and Belgium teams:
I still don't really understand the internal segregation of Belgium, but this issue has been addressed in the past (http://forums.taleworlds.com/index.php/topic,157792.msg3796365.html#msg3796365), and the decision was made to allow Belgium players that do not speak Dutch (read: choose not to speak Dutch) to play with teams that speak their chosen language. This decision was made for this year only with the understanding that it would not negatively affect teams, but would allow players to participate who would otherwise be unwilling or unable to participate.
In regards to Ukraine players on the Russian team:
See the first rule quoted and the decision regarding Shemaforash and Goliath.
In regards to Team Hellas:
Since there was an accusation, we will review this and take your roster into consideration when your team is submitted. Please see the second rule mentioned, I will quote it again here:
In extenuating circumstances, where a nation is having trouble finding enough players, on it's own, the captain should approach an event admin about merging with another nation.
Once again, captains, please police your own teams so the tournament admins don't have to do this **** again.