I understood that. Unfortunately, we don't do general proofreading or we would be inundated with "Does this sound correct?" and "Does this sound natural?" questions.
Usually there is a specific concern that someone has -- "Is 'a bit of' used to mean 'a little' correct in this sentence?" Or "Is 'grumpy' the right word for someone who is out of sorts correct?" That's the sort of thing we do here.
I'll admit it may be different in the Spanish forum.