India, Africa and Southeast asia
It spread through simply trade and conquest.
ISLAM
Trade positively impacted the spread of Islam. As Muslim merchants brought their wares to places outside of the Islamic Caliphates, they were able to introduce West Africans, East Africans, and Indonesians the tenets of their faith and seed new Muslim communities.
royal marriages, missionaries, conquest and trade.
Islam first spread along TRADE ROUTES since merchants could often bring the religion to places too far away to effectively conquer.
Muslim merchants set up trading posts throughout southeast Asia and taught Islam to people there.
spread ideas through trade, conquest, and expansion
Islam spread to the island of southeast Asia through traders and merchants. Many of the city states in Malaysia and west Indonesia had a strong maritime trading orientation and as a result, accommodated many Muslim merchants from Arabia, India, and the East African coast. As a result, the ideas of Islam became incorporated in those areas, supplanting the previous Buddhism. In the rest of Southeast Asia, such as Thailand, Cambodia, Laos, Burma, and Vietnam, the orientation was much more inland and river-based trade, meaning that Islam did not have the same inroads and access.
Islam spread fairly easily in Mali, as the people practiced Islam with their traditional religions. Islam first reached West Africa through trade.
Trade.
Trade played a crucial role in spreading the Arabic language. As Arab traders traveled across regions and established trade networks, they interacted with different communities and cultures. Through this interaction, the Arabic language was exchanged, adopted, and gradually spread, becoming a lingua franca for commercial and cultural exchanges in the Arab world and beyond. Over time, trade routes and economic connections further facilitated the diffusion and influence of the Arabic language.