The names got nothing to do with NT. The original names are always there and never changed, displaced or any less invisible than before and in fact when looking at a roster in a NT I think only their real names should be dsiplayed even if their owners desgiante the different name for them (which would be shown in that owner's roster site). It's not something that should confuse NT coaches or owners and definitely not something that should do anything with merchandizing.
The suggestion for American names was just example I brought up with me cause my team is in America so don't think of it strictly in America.
What I really like to point out, is that unfortunately those that would most care about such change unfortunately not the type that would come and read this forum :-(. It's the Polish who can only speak Polish, Austrian who can only speak German, Israeli who can only speak Hebrew.. and anyone who either doesn't know english or not care enough to participate in any forums outside of their own national forums. Those people are most attatched to their countires and would enjoy more if they see names associated with their countries. Or if they're fan of basketball in their country and root for certain teams, that like most of those teams outside the US which have more or less 75% of the players from their country, that being able to designate names allow them to feel like they are owner of such team that resemble their nation.
It's just an additional side name, it shouldn't confuse anyone just as if you qoute a player by a nickname, you won't have NT coaches confuse someone because of a name given in the qoute, they'll easily identiy the player by their real name because it would just as equall as before be visible to everyone.