This text is an attempt at the analysis of selected cultural codes in the context of their use in the process of communication between individuals who are members of different cultures. The level of effective communication determines the efficiency of processes going on in many areas, including management and building a varied society, where multiculturalism is becoming more and more common. As a result of current events and circumstances, many countries where the issue of multiculturalism seemed a challenge of quite a distant future must now face new problems - fast-paced globalisation that requires negotiation competences in different cultures or increasing numbers of migrants, also as employees. Analysing the issue of intercultural competences the authors concentrate on showing cultural differences as barriers in communication between individuals and on emphasising their sources for the understanding of these differences. Thus authors hope that this text will contribute to understanding the essence of communication competences in a global multicultural society, also for its sustained development. Moreover, the article shows perspectives for the application of communication processes in solving intercultural conflicts and in creating new types of intercultural relations in a global society.