Although it is recognized that the diversity influences the knowledge sharing between employees, there is very little empirical research on the relationship between language diversity and knowledge sharing in the organizations. In this context, this study adopts the network perspective and explores the linguistic composition of personal knowledge networks, its causes and consequences. A survey was conducted involving 403 participants in different subsidiaries of a multinational organization. Hierarchical regression analysis and ANOVA were performed to test the hypotheses. Regression analysis showed that the language diversity in the immediate department and linguistic association in the organization significantly affects the language diversity in employees personal networks. However, against expectations, language attitude did not have any effect. Moreover, ANOVA results show that the employees with multilingual knowledge-sharing networks perform better than those with monolingual knowledge-sharing networks in the organization even though their knowledge-sharing behavior is the same.