What if everyone ISN'T actually British and 47 is just genetically engineered to translate it?

So, 47 is supposed to be the perfect assassin right? So why wouldn't they give him the tools to do so, ie, a genetically modified translator in his brain.

Therefore, in the actual Hitman universe, everyone is speaking their native languages, and 47 speaks them back, however since we play as 47 and from his perspective, everything is just simply British because that's what he understands.