How did conquerors of other nations throughout history communicate with their newly conquered land? The language may have been different and learning a new language to negotiate terms would take time, no?

Sorry, we don't allow throughout history questions. These tend to produce threads which are collections of trivia, not the in-depth discussions about a particular topic we're looking for. If you have a specific question about a historical event or period or person, please feel free to re-compose your question and submit it again.