Language in One Piece I understand that One Piece is anime and not real, but come to think of it, how come everyone speaks the same language. In the Punk Hazard Arc, Kin'emon exclaimed about foreign lands from where the straw hats came. But still, everyone with no exclusions speaks the same. Any indications or anything?
This was answered by Oda in SBS Vol. 25:

Reader: I have a serious question for Oda-sensei. How come, in manga, no matter where you go, everyone always speaks the same language?
Oda: Because manga is something where everyone's dreams are depicted.

source: http://onepiece.wikia.com/wiki/SBS_Volume_25

Besides this, I remember another statement from Oda where he said the offical language in the series is english (no source, sorry). This is indicated when you see an english name for an attack or a character. (e. g. &quot;Nations Might&quot; is not written in kanji in the manga.)