I thought it could be NZ as they have had the pick of the Polynesian countries, but no, it is Samoa who have 13 foreign born players, NZ only have 5.
Samoa 13 all born in NZ
Tonga have 12
The only team with 100% true countrymen playing in the world cup is Argentina where all 31 players were born within its borders.
You can find out how individual players are eligible to play for their chosen countries ......here
Just watched the Scots loose to the Boks. I'm now getting nervous about the England V Aussie game which starts in an hours time.