Sometimes referred to as Literal translations, the rules for this type of translation are “keep as much of the original information and form of the text (including word placement) as possible; only deviate from this where needed to make the text more understandable.”  It should be remembered that word placement in sentence carries information.  For example, by changing the position of a pronoun in the English language, you can completely change the meaning of a phrase.  “I am the man” and “Am I the man?” have two different meanings because “I” was moved to a different part of the sentence.  This translation will take into account idioms where it can translate them directly without losing accuracy or adding too many English words to make it understandable.  In the case where an idiom is found that cannot be directly translated, a  translation is found that keeps as much of the original wording intact as possible.  Some leeway is granted to translators to change and or add words to make the text readable in these instances.  However, the leeway is small.  Keep in mind that the object of the translators is not  “Readability” it is “Accuracy”.  Note, it is not that these translations are not readable — they are very readable — it is say that that if the translators are forced to make a choice between accuracy and readability, they will choose the less readable, more accurate translation.