Urupa (Urupá, Ituarupá) is an extinct

Chapacuran language The Chapacuran languages are a nearly extinct Native American language family of South America. Almost all Chapacuran languages are extinct, and the four that are extant are moribund, with the exception of Wari'. They are spoken in Rondônia in ...

. Yaru (Yarú, Jarú) was a dialect or a closely related language.

References

Chapacuran languages Extinct languages of South America {{na-lang-stub