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Most observers estimate that between 300,000 and 350,000 Brazilians settled in eastern Paraguay in the 1960s and 1970s. The majority of the people speak an indigenous language, although they do not self-identify ethnically as indigenous.
Guarani, a Tupi Guarani language and the language of eastern Paraguay's dominant precolonial indigenous population, is recognized as an official national language along with Spanish.
The 1992 census counted only several thousand Korean and Chinese immigrants, but observers place their numbers between thirty thousand and fifty thousand.
Spanish is the language of business and government, and Guarani is spoken in everyday life.
According to the 1992 census, nearly half the population speaks both Guarani and Spanish in the home and 39 percent speaks only Guarani.
Population figures for the ethnic populations are disputed.
Estimates place the indigenous population at less than 3 percent of the national population.
In contrast, eastern Paraguay has rolling hills, richer soils, lush semitropical forests, and grassy savannas.