Language Didactic concerns not only about the object of teaching but of the issues realted with the person who is learning. It recieves contributions from other sciences that study the language but are not focus in teaching. (sociolinguistic, neurolionguistic, psycholinguistic, technology).
The purpose of learning a language is to achieve a communicative use of it, for this reason the study of the language is done in an interdisciplinary form.
The acquisition of a foreign language attempt to reach individuals that be competent communicatively and performance the language. " The main aim of the language is focus in the verbal interaction" Bajtin (1979).
It is the place where the approaches done by researches and the teaching reflection based in the practice of the classroom converges.
The Language Didactic set the content to teach and why this among many possibilities.