They're all doing a great job and I'd love to showcase them as much as possible. And thank you. It's unusual for people to show such an interest in an OC, as opposed to fanart of an established character, so it's always lovely to hear that.
James's voice actor is an actual Brit, yes, but Santiago and Louis are voiced by Americans. Louis's voice actor, however, does have a France-French friend who helps him with the accent and the words where she can.
Having done animation myself, I can understand how irritating the sound track and dialog can become. One of my tutors would say if you didn't hate the sound track/dialog than you still need to work on the scene. Good luck I am looking ford to seeing the finished work.
I just saw the voice cast video and I didn't expect them to be so talented, (...finding the right voice actor is usually a tough job) these guys are good. I personally like James's voice best, kind of "fits" the character really well in my opinion. Are you going to upload this somewhere on the internet, when it's finished?