The idea of 21st LISBON International Conference on Law, Languages, Economics and Marketing (LLEM-21) scheduled on July 5-7, 2021 at Lisbon (Portugal) is for the researchers, academicians, managers, social scientists, scholars, engineers and parctitioners from all around the world to present and share ongoing research activities. This conference provides opportunities for the delegates to exchange new ideas and application experiences face to face, to establish business or research relations and to find global partners for future collaboration.