Function refers not only to individual words and how they relate to each other, but also to how words are used. For instance, in some languages it is possible to repeat something for some effect. A translator needs to know what that effect is, that is, what is the function of repetition in the language under study. This approach is referred to as functional equivalence translation . He then matches the same functions between languages, regardless of what forms are used to carry out those functions.
Forms communicate meaning through various functions required of language.
If functions are not the same, then meanings will not be the same. And the purpose of translation is to transfer meaning. Language must perform a wide range of functions. To inform 2. To question 3.