Bala language

Bala ("Lobala") is a Bantu language of the Democratic Republic of the Congo. According to Maho (2009), it includes Boko ("Iboko").
Distribution and status.
Bala is spoken in the northwest corner of the Democratic Republic of the Congo west of the Congo River by about 60,000 people. Most of these are not monolingual, but the language is being passed on to the next generation, especially in more remote areas. "Ethnologue" classifies the language as "vigorous", meaning that it is sustainable.
There are four dialects of Bala: Likoka, Poko ("Iboko"), South Lobala, and Tanda.
Negation.
Like many languages in the Benue-Congo group, Bala forms negatives by adding an affix to the verbal phrase. However, Bala is unusual in that it adds two affixes to form negatives. These are added as a prefix and a suffix to the subject affix. For example,
Here the "te" and the "ik" elements are the double affixes indicating negation, attached to the "ba" affix indicating third party plural. The "tub" element is the verb "to sing" and the "aka" affix indicates the past tense.
In a similar way the "t" and "iká" negation elements are affixed to the verbal affix element "a" (indicating third person singular).