Board Thread:Wikia Discussion/@comment-25683568-20150717101921/@comment-26716042-20150717103944

Kai Ni (or Kai San, Kai Yon) sounds more natural than Kai 2 (Two/Dos/Due/Dois)... Keeps the passion of it *hmm hmm*

And as Flonnaru says, learning just that little bit isn't difficult at all.