This paper addresses intercultural business communication in the times of globalisation. The research aims to describe the peculiarities of British, American, and Russian lingua-cultures against the background of English professional language as a component of the linguistic system and one of the social dialect types. English professional linguistic culture is commonly not viewed as a separate type of linguaculture. The authors consider it as a subculture comprising such components as speech etiquette, traditions, customs, etc. constituting a part of social norms of conduct. This paper deploys the following methods of research: (a) comparative analysis, (b) cognitive and discursive analyses, (c) lexical units analyses, (d) linguacultural interpretation of lexical units. Considering the international perspective, the authors explore people's self-identity, as well as their relationships with other nationalities, which, in consequence, identifies differences in ethical, social, and professional norms, and affects communication. The authors conclude that today, the regional, professional, social, and personal factors determining people's linguacultural perceptions present a challenging subject of research, along with the national values shaping the norms of professionals' communicative behaviour.