Diachronic semantics of the modal verb -sóból- in Luganda: a corpus-driven approach

In this article the semantic evolution of the modal verb -sóból- in Luganda is examined through the analysis of a diachronic corpus spanning the last 120 years. It is shown that the usage frequency of this verb increased exponentially between the early 20th century and the present, and that its use as a lexical verb has dramatically decreased during the same time span. The corpus data furthermore substantiate that its modal uses have been extended from the exclusive expression of dynamic possibility until the 1960s to deontic possibility. Methodologically, this is the first full-scale article within the young field of Bantu corpus linguistics in which a corpus-driven study is performed on a diachronic corpus. The approach is not only shown to be feasible, but the encouraging results will hopefully entice colleagues working on the Bantu languages to undertake the building and analysis of such diachronic corpora for linguistic purposes