There are levels of proficiency that also come to bear - spelling, grammar, syntax, vocabulary and other elements all play a part in translation. Bear in mind that one must be proficient in both the source and the target languages. When you hire a professional translator you are paying for their experience, their education, their area of expertise, their judgment and their accuracy. A good translator will know the culture of both languages and be familiar with the idiomatic expressions. Just as any other job well done, translation takes time.
Translation is more than just finding the equivalent word.
Accent marks do make a difference in both pronunciation and meaning. There are more letters in the Spanish alphabet than in the English one. There are different ways of looking at the world. Important decisions can't be made without information. Persons with disabilities and their families are going through enough already without the added burden of incomplete, inaccurate, confusing or insensitive information.