Russell H. Kaschula is Professor of African Language Studies at Rhodes University. He holds the NRF SARChI Chair in the Intellectualisation of African Languages, Multilingualism and Education. His most recent edited volumes include Multilingualism and Intercultural Communication (2017) and New Frontiers in Forensic Linguistics (2019). In 2019 he was selected as the Mellon Global South Senior Fellow at AUC, Cairo. H. Ekkehard Wolff is Professor and Chair Emeritus of African linguistics, Leipzig University. Recently published works include The Cambridge Handbook of African Linguistics (2019), A History of African Linguistics (2019), and Language and Development in Africa: Perceptions, Ideologies and Challenges (2016).