I'd be happy to help do the English voice over for you guys, but I'd like to see if there's any others willing to step up and offer their services besides me. And if so, let the community vote who they feel fits the project best.
What time frame are you needing this voice over to get completed?
Also, it would be good to view the final animation in order to fit the voice over tempo and "word flow" congruent of the animations.
Are you pretty close to having this animation 100% complete?
For reference... I do the Beyond Bitcoin intro voice overs.
ps- if you've already got a French voice over done and need it "livened" up some, please PM me. I'd be more than happy to help polish the audio!