Both throughout history and at the present moment, environmental change has driven new patterns of human mobility and settlement and with it has rearranged social relations. An important but largely overlooked element of environmental change has been its impact on language, linguistic expression, cultural dialects, and cultural heritage.
Threats to linguistic diversity are considered most commonly in terms of the loss of language due to restrictive government policies, market dynamics and demographic changes. The research field of bio-linguistics has demonstrated a spatial correlation between areas of high biological diversity and high linguistic diversity at the global level. This book contains the issues related to linguistic diversity as a dynamic mosaic of interlingual interactions that are created and maintained through multilingualism. The threats to linguistic diversity, cultural dialects and cultural heritage encounter the human knowledge structure (the archaeology of knowledge). In this line of questioning, each paper has argumentatively introduced various subjective approaches and interpretations, taking as our site South Asia and Southeast Asia, both regions of intense linguistic diversity that are and have undergone various environmental changes throughout history. Thus, the ecological change and mobility have impacted multilingual mosaics in various regions.
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