Saraveca is an extinct

Arawakan language Arawakan (''Arahuacan, Maipuran Arawakan, "mainstream" Arawakan, Arawakan proper''), also known as Maipurean (also ''Maipuran, Maipureano, Maipúre''), is a language family that developed among ancient indigenous peoples in South America. Branc ...

once spoken in

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

by the Sarave. It is saidEncyclopædia Britannica, "Numerals and numeral systems". to be the only language with a

numeral system A numeral system (or system of numeration) is a writing system for expressing numbers; that is, a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner. The same sequence of symb ...

based exclusively on five, although

quinary Quinary (base-5 or pental) is a numeral system with five as the base. A possible origination of a quinary system is that there are five digits on either hand. In the quinary place system, five numerals, from 0 to 4, are used to represent a ...

systems exist. To some extent this is also an areal feature of other

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the souther ...

n languages; many form their numbers 6–9 as "five + one", "five + two" and so on.

References

Languages of Bolivia Languages of Argentina Extinct languages of South America Arawakan languages Mamoré–Guaporé linguistic area {{Arawakan-lang-stub