Whenever there has to be a translation, it has to be authenticity and the true meaning conveyed without the loss of the essence of the language. Translation is never word to word but the conveyance of the meaning of a particular passage or story. The exact word for word will not give the true excerpt of what has to be conveyed. Hence a native Spanish speaker as well as native English speaker is required so that there is no distortion of facts. For this very same reason there is English to French translation services available.
The translation may not be the same size of the paragraph given as phrases and textual context may change as per language syntax. In Spanish translation it will be a little less longer than English one.
Having translators will help a lot for a good turnaround time and the project time is expedited.
Translation is done keeping in mind the kind of audience you are catering to. If it is an older persons that who are your readers the the choice of words will be different whereas for the younger audiences such as children, the explanation and play of words will be suited to them for easier deciphering.
Scientific or mathematical translations will not take many changes whereas literary translations may differ in sensibilities accordingly to the particular language concerned.
A good translation will stand out and many a time outshone the original so the translator has to keep in mind that mediocrity should not set in as the main purpose of translation is defeated.
About French language
It is an Indo European language and spoken in Latin American countries. The standard of the language that was once used is now possessed by a few scholars. Many people take the diction skill classes to get nuances of pronunciation right.
Translations in Spanish
The translations are yet to get big and are not so popular yet. There are various kinds of translations that take place according to the need such as technical, legal, literary, biblical, scientific etc.
The translations cannot be judged as they are subjective in nature as the wider audience may different perspectives about the same piece of work. But it should be kept in mind that we should not be judgemental but take it not in the sense of the wisdom of the person or his/her human spirit in context to the translations made.
A detailed analysis or moral judgements should not be mixed into the piece translated as it would be against the person who would have taken pains to write out what was not his/her work but merely presenting it in a different language. Seek English to French translation services professional help here.