Khoisan languages
Anthony Traill noted the Khoisan languages' extreme variation. Despite their shared clicks, the Khoisan languages diverge significantly from each other. Traill demonstrated this linguistic diversity in the data presented in the below table. The first two columns include words from the two Khoisan language isolates, Sandawe and Hadza. The following three are languages from the Khoe family, the Kxʼa family, and the Tuu family, respectively.