Westphal's fieldnotes on Kwadi were still being analyzed as of 2018, with the hope that additional grammatical parallels could be identified.

Güldemann (forthcoming) reports the following reconstructed pronominal system, of a minimal/augmented type: where "E" is an undetermined front vowel and the pronoun base was a deictic like *xa or a generic noun like *kho 'person'.

However, the relationship has some predictive value, for example if the back-vowel constraint, which operates in the Khoe languages but not in Sandawe, is taken into account.

However, there is an additional correspondance: the Kwadi uvular affricate and fricative correspond to both lateral and alveolar clicks in Proto-Khoe, similar to the fifth click series in Proto-Kxʼa, and Fehn & Rocha (2023) hypothesize that a similar development took place in the Khoe–Kwadi languages.

Rather than suggesting a particular phonetic value, as for example implied by the *‼ of Proto-Kxʼa, Fehn & Rocha use the wild-card symbol *Ʞ.