The paper examines team building in multicultural and multiethnic work environments – particularly in NGOs – by linking classic accounts of effective teams with sociolinguistic and socio-emotional perspectives. It conceptualises workplace teams as speech communities in which members share, negotiate, and sometimes contest linguistic norms, expectations, and emotional display rules. Drawing on management and organisational studies, the text outlines key structural conditions for effective teams, including clear goals, appropriate leadership, resource allocation, and mechanisms for accountability and cooperation. These insights are then integrated with research on emotions, culture, and communication, which highlights the role of emotional attachment, trust, and creative problem-solving in sustaining team cohesion. The paper argues that effective team building in such contexts requires not only formal structures but also deliberate cultivation of shared communicative practices and affective climates that support participation, innovation, and mutual understanding across cultural and linguistic differences.