The textbook describes systems and modern methods of machine translation for natural language. The publication can be used for undergraduate, graduate and doctoral students of the specialties “Information Systems”, “Information Security Systems”, “Informatics”. This book can be used for graduate and master\'s theses in computational linguistics and artificial intelligence. Practical tasks are given for each chapter to repeat the topic. The last chapter provides a post-editing system in machine translation. The textbook is intended for students studying in an enlarged group of specialties and areas of higher education “Linguistics and literary studies”, studying the discipline “Information Technology in translation”.