While I can now visit Vietnam and communicate with some locals in English, what dangers faced someone who got lost in a foreign country? When did it start to be common that people speak other languages as well?
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Travelers need guides, to help them navigate unfamiliar terrain, to introduce them to the people they need to meet with, and to translate around language differences.
Today the idea of just flying to a place where you don’t know the geography isn’t a thing, with ubiquitous maps and smartphone apps; and language translators. That wasn’t the case for the 12K years of human history before the year 2000.
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