Lots and lots of communication can be done with zero langauge. Its not that hard to order food in a restaurant without speaking the local language, you just point at what you want and if they dont understand, you still get some food.
So it depends what situatiin you mean, traders dont need to speak the local language to trade, diplomats would stay for a long enough time to learn the language and turism did not realy exist for most of human history.
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