Olubo or Lolubo is a Central Sudanic language spoken by 33,000 Olubo people in Southern Sudan.
Vowels form two vowel harmony sets, based on advanced and retracted tongue root. The [âÂÂATR] group is commonly transcribed as , and the [+ATR] group as . is phonetically [âÂÂATR] but is found in roots of both sets.
There is a tenth vowel quality , which only occurs after . When and are in separate morphemes, is in free variation with .
Olubo has high , mid , and low tones.There are also six compound tones, low-mid , low-high , mid-low , mid-high , high-low , and high-mid .