Lubu, China

With a population of just 95,820, Lubu is a remote outpost in Indonesia's Sumatra region, surrounded by speakers of the Batak Mandailing language. The Lubu people here have their own Malayic tongue, but good luck getting anything done without fluency in Indonesian. Bureaucracy is a persistent headache, and you'll be off the beaten path far from the comforts of major cities.

This isn't the place for the faint of heart. If you can handle the isolation and hassle, Lubu might appeal to adventurous expats seeking an immersive cultural experience.