Guarani ( or ), specifically the primary variety known as
Paraguayan Guarani (
endonym avañe'ẽ 'the people's language'), is an indigenous language of
South America that belongs to the
Tupi–Guarani subfamily of the
Tupian languages. It is one of the official languages of
Paraguay (along with
Spanish), where it is spoken by the majority of the population, and where half of the rural population is monolingual. It is spoken by communities in neighboring countries, including parts of northeastern
Argentina, southeastern
Bolivia and southwestern
Brazil, and is a second official language of the
Argentine province of
Corrientes since 2004; it is also an official language of
Mercosur.