Nominal affixes and number marking in the Plateau languages of Central Nigeria

The Plateau branch consists of between sixty and eighty languages spoken in central Nigeria, spreading from Lake Shiroro to the banks of the Benue River. A major branch of East Benue-Congo, Proto-Plateau is usually considered to have a system of alternating nominal affixes marking number combined with alliterative concord. The paper presents an overall internal classification and then reviews the evidence for affix systems by subgroup, taking a specific language as an exemplar, with a view to linking these to broader hypotheses about Niger-Congo nominal classes. It appears that Plateau has undergone extensive affix renewal, and thus only fragments of any more coherent system are still present. Plateau languages originally had a rich noun class system with CV- and V- prefixes and alliterative concord, but a wave of renewal and analogical re-alignment led to many of the CV- prefixes disappearing or becoming unproductive and replaced by a much smaller set of V- prefixes.