This research means a comparative study of the accent in both the Arabic and French languages, and he talked about the accent for both the Arabic and French languages (as far as the research is concerned), a summary of the points of difference between the two systems, as well as the focus of the difference in which we have learned from which the students make mistakes Explaining their causes, then giving some modest advice to ensure that these mistakes are avoided by both the student and the teacher. One of them is that the student who wants to learn a new language must take into account his mother tongue system while learning the foreign language. Although what a new system learns cannot be compared to the mother tongue at all levels, each language has special rules and foundations that distinguish it from other languages and this applies to the French language, as it is a language that cannot be compared to Arabic because it is a language that does not belong to the language family from which the language was born Arabic, however, applied linguistics focuses in one of its curricula on taking into account the aspects of agreement and difference in learning languages while not belonging to one origin. The research also showed the role of the teacher and its importance in avoiding the student making mistakes, so he must be attentive to students mistakes and teach them the correct pronunciation for each sound. It focuses on new voices and thus avoids students making mistakes. In addition to the necessity for the teacher to be alert to students mistakes, he, in turn, must have received an intensive education that qualifies him to teach the foreign language. Levels. Each language has special rules and foundations that distinguish it from other languages, and this applies to the French language. It is a language that cannot be compared to Arabic because it is a language that does not belong to the language family from which the French language was born. Applied linguistics focuses in one of its curricula on taking into account the aspects of agreement and difference in learning languages while not belonging to a single origin. The research also showed the role of the teacher and his importance in avoiding the student making mistakes, so he must be alert to students mistakes, focusing on them, thus avoiding students mistakes. .