This study aimed to investigate the influence of proficiency in two or more languages on forming individual identity and social integration. To achieve this goal, a methodology was employed that was based on an analysis of the cultural aspects of bilingualism and an exploration of strategies for preserving cultural values in a linguistic environment. The research was conducted by analysing data from various countries, including Canada, Switzerland, the USA, South Korea, Vietnam, and others where bilingualism is prevalent. This allowed for the conclusion that bilingualism has a positive impact on preserving linguistic heritage and promoting harmonious social integration. The article delved into the cultural facets of bilingualism in detail, specifically strategies for preserving linguistic heritage and the interaction between ethnic groups in multilingual settings. The paper also considered multinational marriages as one aspect that influences cultural heritage and bilingualism. Multinational marriages can contribute to the preservation and development of the diversity of linguistic experiences within a family. The study examined how multinational marriages impact the choice of languages used within the family, and how this affects the identity and social integration of children growing up in such families. The findings of this study demonstrated that bilingual individuals possess a deeper understanding of cultural diversity, fostering more profound intercultural interactions and integration among various ethnic groups within society. Research has revealed that bilingual individuals exhibit more developed competencies and a higher level of adaptability in diverse cultural contexts. The results underscored the significance of supporting and promoting bilingualism as a tool for preserving cultural diversity and facilitating social integration. The findings of this study can be applied to educational programs, government and non-profit policies for preserving minority languages and social integration, as well as in international initiatives aimed at preserving linguistic diversity
assimilation; migration; society; family; marriage; education