There exist clear differences between Jaqaru and Kawki in regard to morphology. jaqarus verb persons, whereas Kawki has only nine (due to a case of homophony wherein Kawki maintained the semantic distinction between two different person markers, but lost the form distinction between the two). Additionally, regressive vowel harmony is present throughout the verb person system in Jaqaru, but does not appear in Kawki. Phonologically, Kawki is differentiated from Jaqaru in its vowel system. Jaqaru contains six vowels- three of regular length and three short, whereas Kawki has only the three regular-length vowels.