Languages in the "Indosphere" (South Asia and Southeast Asia) tend to be more agglutinative, with polysyllabic structures, extensive case and verb morphology, and detailed markings of interpropositional relationships.
Languages within the "Indosphere" (South Asia and Southeast Asia) exhibit a common feature of being agglutinative, meaning they combine morphemes to form words, often resulting in polysyllabic structures. They also have extensive case systems and complex verb morphology, along with intricate markings for inter-sentence relationships.