David Dalby coined the term Bak from the bVk- prefix found in the personal plural forms of demonstratives in the Bak languages. The -k- is not found in other Atlantic languages.[1]
Bijago is highly divergent. Sapir (1971) classified it as an isolate within West Atlantic.[2] However, Segerer (2010) showed that this is primarily due to unrecognized sound changes, and that Bijago is in fact close to the Bak languages.[3][4] For example, the following cognates in Bijago and Joola Kasa (one of the Jola languages) are completely regular, but had not previously been identified:
Gloss
Bijago
Joola Kasa
head
bu
fu-kow
eye
nɛ
ji-cil
Segerer reconstructs the ancestral forms as *bu-gof and *di-gɛs, respectively, with the following developments:
*bu-gof
> *bu-kof > *bu-kow > fu-kow
> *bu-ŋof > *bu-ŋo > (u-)bu
*di-gɛs
> *di-kis > *di-kil > ji-cil
> *ne-ŋɛs > *ne-ŋɛ > nɛ
Comparative vocabulary
Comparison of basic vocabulary words of the Bak languages:[1]
^ abWilson, William André Auquier. 2007. Guinea Languages of the Atlantic group: description and internal classification. (Schriften zur Afrikanistik, 12.) Frankfurt am Main: Peter Lang.
^Sapir, David (1971). "West Atlantic: An inventory of the languages, their noun class systems and consonant alternations." Current Trends in Linguistics 7:45-112. The Hague: Mouton.
^Segerer, Guillaume. 2010a. ‘Isolates’ in ‘Atlantic’. Paper presented at the International Workshop “Language Isolates in Africa,” Laboratoire Dynamique du Langage (DDL) Lyon, 3‒4 December.