How were trade and commerce related to the spread of koine throughout the region?

Trade and commerce played a crucial role in the spread of Koine Greek, as merchants, traders, and travelers communicated across diverse regions. The use of a common language facilitated trade, enabling easier negotiation and exchange of goods among different cultures. As trade networks expanded throughout the Hellenistic world, Koine became increasingly prevalent in urban centers and port cities, ultimately becoming the lingua franca that connected various linguistic groups. This linguistic unification was further reinforced by the cultural exchanges that accompanied commerce, solidifying Koine's status in society.