As a result, it came to light that there was a narrow corridor occupied by the speakers of Chadic languages in the southwest of Bauchi.
[1] With this information, K. Shimizu set out in 1974 to list the languages belonging to the Southern Bauchi Group, to examine their geographical distribution, and to use valid linguistic data to come up with sub-classifications.
This is also the work from which the Barawa subgroup name came from, which was found to be the term used locally in this area to denote the speakers of this dialect continuum.
In 1999, Ronald Cosper published Barawa lexicon: A wordlist of eight South Bauchi (West Chadic) languages: Boghom, Buli, Dott, Geji, Jimi, Polci, Sayanci and Zul.
Many of his papers are available online and include topics such as linguistic classification, syntactic structures such as conditionals, and noun classes such as pronominal and number systems.
However, plurality appears in the verb phrase in two places: (i) the formation of the imperatives (ii) a verbal derivation forming what has come to be called pluractionals.
However, in Chadic South Bauchi West languages, such as Polci, conditionals share their structure with focus, not topic.
In Polci specifically, focused constituents and conditional clauses appear on the left periphery marked by the identifying copula /kɶn/ 'it is'.