Thread:Prodigy1322/@comment-1493741-20130328145620/@comment-1493741-20130402162504

As far as I know, it probably wouldn't. See Hierro is the Spanish word, Tite Kubo (And others) would just apply Japanese characters to it that give off a similiar context and then give it Romaji to use when speaking.

Basically: Hierro = Iron in Spanish 鋼皮 = Steel Skin in Japanese イエロ / Iero = Romaji form

Now, I could be wrong, so don't take it as pure fact. xD