It is, in fact, impossible to learn anything unless you find ways of integrating it into what you already know - in this case the mother tongue. It is thus important that the teacher is able to ensure that students have the correct translation in their minds. Translation can also help students be themselves they can express what they want to say and then learn how to say those same things in English. Practical ideas You can deal with basic vocabulary problems through translation. This saves time compared with long explanations and ensures the correct meaning is understood.
Students can then learn from seeing their ideas in English.
Planning in the mother tongue can prevent language problems interfering with the generating of ideas.