How did ancient trade routes influence the spread of languages?

Ancient trade routes served as highways for cultural and linguistic exchange. As merchants traveled along routes like the Silk Road, the Spice Routes, and Mediterranean sea lanes, they carried their languages with them, creating contact zones where speakers of different tongues had to communicate. This produced pidgin languages, trade lingua francas, and widespread borrowing of vocabulary, particularly for goods, numbers, and commercial terms. Over time, dominant trading languages gained prestige and spread far beyond their homelands. Arabic spread across the Middle East and North Africa partly through Islamic trade networks. Sanskrit influenced Southeast Asian languages through Indian Ocean commerce. Greek became a Mediterranean lingua franca following Hellenistic trade expansion. Essentially, wherever goods moved regularly, languages blended, borrowed, and sometimes displaced one another.