What term represents a bridge language that facilitates national politics, commerce, and trade in multilingual societies? extinct language lingua franca indo-european dialect regional speech disparity?

The correct answer among the choices is lingua franca. In multilingual societies and populations, a lingua franca is adopted as a medium of communication between people with different vernacular languages. Countries like India and the Philippines with a post-colonial past and a plethora of local languages use English as their lingua franca, for example.