If you watched for example the tv show Black Sails, and in other series too, they have french and spanish actors with their own native acccent act in english, it gives a type of an exotic Vibe to the story.. Black Sails was about Pirates too, but there are other series that does that, like The Expanse, it makes the characters way cooler and gives them dept.. I'm thinking of Camina Drummer and Klaes Ashford, they were hands down my favorite actors in the show..
A light tone to give the right feeling.. At least have Luffy's named attack voice Stretch too, not just the motion..
Guuuummmmmm Guuuuuuuuummmmmmmmmmmmmmmmmmm(u)....................................... PPPPPPPPPPPPistolllllll(u)!!!!!
The '' u'' can be very subtile barely recognizable, just to give a special touch than just straight boring english..
Dude what are you on about.. The reason why Zoro is so badass when he puts on his Bandana is because it almost drops on his eyes looking like a fucking demonic beast.. THat's the whole point fuck..