The current book contains eleven chapters, the first chapter deals with the concept of language, the second chapter deals with language function, the third chapter deals with language skills, the fourth chapter deals with reading and reading comprehension, the fifth chapter deals with theories of language learning and acquisition, the sixth chapter deals with language teaching methods, the seventh chapter deals with language and thinking, and the eighth chapter deals with Language ability The ninth chapter deals with verbal communication and the tenth chapter deals with language disorders and the eleventh chapter deals with the treatment of language disorders. And its relationship to thinking, in addition to language disorders and the way to treat them according to the latest findings in this field globally.