The Himalayas theory posits that the development and evolution of natural language are influenced by geographical landforms such as mountains, rivers, oceans, as well as climatic conditions and environments at different locations around the Earth. The Himalayas mountain ranges serve as a significant natural barrier for human migration and language evolution. According to this theory in linguistics, human languages globally are divided into two major categories: Phonographic languages and Ideographic languages, separated by the Himalayas and its neighboring mountain ranges. The West Himalayas languages (WHL) are predominantly phonographic, while some East Himalayas languages (EHL), like Chinese, are ideographic. Languages in the northern and southern regions of the Himalayas are influenced by both WHL and EHL, resulting in “Mixed Himalayas languages” (MHL). Research based on the “International Alphabet Text” (IPT) database has identified over 100 languages as phonetic or ideographic from the West Himalayas and East Himalayas, as well as the surrounding areas. However, further research employing diverse linguistic approaches and methods is needed to validate the Himalayas Theory. (More citations needed)