This research work considers the importance of learning of foreign languages, especially English, and their role in education, research, knowledge transfer, language and cultural growth. Language overlapping, between English and Arabic, leads sometimes to acute problems. To approach these problems, the work tries to discuss the acquisition of children of their mother tongue, its expansion and its use creatively in different disciplines.
The work tackles the attraction of English to some experts in their fields, the thing that drives them to look suspiciously and down at Arabic accusing it of incompetence to catch up with new changes. Since language overlapping is an old problem, this has entailed a reference to Iben Khaldoun’s diagnosis of it with commentary. The work asserts eventually the essential use of Arabic as a language of education, research, culture and knowledge production, without neglecting foreign languages learning, above all English. The work is carried out in the light of the available studies on this issue.