• Linguistic theory: syntax, morphology, and interface systems;
  • Sociolinguistics: modelling language variation, contact and change;
  • Psycholinguistics: the relation between models of language acquisition and language contact and creation;
  • Evolutionary linguistics: the relation between biological and cultural evolution in language creation.
  • Creole languages, Niger-Congo languages, Bantu languages, and Germanic languages, in particular Varieties of English worldwide.