English Proficiency as a Key to Effective Communication in MultilingualCustomer Service Environments Call senter. Proceedings Law, Accounting, Business, Economics and Language, [S. l.], v. 2, n. 1, p. 327–333, 2025. DOI: 10.47701/label.v2i1.5271. Disponível em: https://ojs.udb.ac.id/label/article/view/5271. Acesso em: 30 june. 2026.