Abstract- The aim of this study is to investigate the causes and solutions of the declining in Sudanese university students English fluency during the last three decades (1990-2020). To investigate the research problem, the study strives to find answers for the following questions:1. To what extent can the Arabicization affect students' fluency? 2. Will the cancellation of English literature from the secondary stage affect students' fluency? 3. To what degree can other factors like lack of English listening labs, the change in education ladder and curriculum affect students' speaking fluency? The researcher conducted qualitative and quantitative study to investigate participants' views and levels. The participants in this study were (300) Sudanese university students and 30 university doctors from well-known Sudanese universities. The researcher used two questionnaires to investigate the respondents' views toward factors that may affect students' speaking fluency. Besides, pre and posttest of English speaking were developed and applied to measure students' levels and to investigate the development in their levels after finishing the program. The course duration was 12 weeks. The study took place in Sudan, in June 2019. The results of the questionnaires show that, all questions raised above have negative affect on students' speaking fluency. As for pre and posttests of speaking, the result was significantly different in favor of the post test. The study recommends, the need of effective speaking program for developing students' fluency regarding the factors mentioned above.
Keywords: fluency, Arabicization and Sudan.