Jola-Fonyi language

Jola (Diola; Jola: Joola), also called Jola-Fonyi (Diola-Fogny) and Kujamataak, is a language spoken by 475,000 people in the Casamance region of Senegal, and neighboring countries. Jola-Fonyi is one of several closely related Jola languages spoken in the area.

Vowels
Vowel length is also phonemic.

In Senegal
In Senegal, the decree No. 2005-981 created the official orthography of Jola.

Long vowels are indicated by doubling the letter:. The acute accent over a vowel <á é í ó ú> indicates that the advanced and retracted tongue root for that vowel and the other vowels of the words by vowel harmony.