Bearing in mind, this was a time when general population saw light rain as a sign from God, they lapped up the stories from the "faraway traveler" and quizzed him about his fake home for years while he hung around and got high on opium.
How Did He Do It?
George Psalmanazar was no dumbass. He was top of his class, fluent in Latin by seven-years old and had a knack for philosophy. Born and raised in France, Psalmanazar decided to see the world but, more to the point, he decided he didn't want to pay for it. So, how do you get a bunch of strangers to let you into their homes for free? By posing as an exotic, otherworldly Japanese man.
Even Seacrest wouldn't do this.
He started off in Rome, pretending to be Japanese by eating strange foods and sleeping upright in a chair (like the Japanese) and talking in gibberish (like the Japanese). Sure enough, the Italians laughed at him.
Storming off and jumping ship to a more impressionable England, Psalmanazar switched to being Taiwanese. He talked in a made-up language, followed a foreign calendar and generally acted like a lunatic to seem more "exotic," and the English ate it up. He was so famous in England, he even wrote a hugely successful book about Formosa which of course was utter bullshit, complete with ridiculous claims about social behaviors, language and geography.