Língua Geral of São Paulo
The Língua Geral Paulista (São Paulo General language), or Tupí Austral (Southern Tupi), was a Tupi-based trade language of São Vicente, São Paulo, and the upper Tietê River. In the 17th century it was widely spoken in São Paulo and spread to neighboring regions. From 1750 on, following orders from Marquis of Pombal, Portuguese was forcibly taught to Brazilian children in schools. The Língua Geral Paulista subsequently lost ground to Portuguese and eventually became extinct.