Native language (Arabic language) is the first language (L1) that the Algerian child learns from his parents and at school. The feeling of mastery and ease of this language leads to a certain feeling of linguistic and emotional security in the learners. On the contrary, in other foreign languages, as is the case with the French language, some Algerian learners tend to find themselves in stressful situations facing more complex problems taking as an example the use of French prepositions in writing. Thus, the teaching of the Arabic language allows FFL learners complete mastery of written and oral expression. This teaching, which is a very important factor, participates in the development of their personalities, but it must equip them with a basic linguistic instrument to penetrate the other different disciplines including the learning of foreign languages.