Earlier quoted context omitted.
I work at Stripe, though not on the L10N/I18N or identity teams. It would be tremendously helpful if you could send me some feedback so that we can improve, jlh at stripe dot com. I'm a native Spanish speaker too, and nothing in this announcement strikes me as unintelligible, but that might be my own biases at play given the familiarity with Stripe's lingo.
Are you going to pay me? If not, good luck!
Otherwise, if you're a trained linguist and have demonstrable consulting experience QA'ing technical documentation then we'll be happy to arrange something.
In either case, we appreciate your feedback, and my emails are open!