Berba language

Berba, also known as Biali, Bieri, Bjeri, Bjerbe or Bialaba, is a Gur language of Benin. There are also a thousand or so speakers in the Kompienga Province of Burkina Faso, where they are believed to have originated in the Savanes Region of Togo.

Writing system
The acute accent on the vowel is used to indicate high tone when there is ambiguity.