Baegert's data is analyzed by Raoul Zamponi (2004). On existing evidence, Guaycura appears to be unrelated to the
Yuman languages to its north. Some linguists have suggested that it belonged to the widely scattered
Hokan phylum of California and Mexico (Gursky 1966; Swadesh 1967); however, the evidence for this seems inconclusive (Laylander 1997; Zamponi 2004; Mixco 2006).
William C. Massey (1949) suggested a connection with
Pericú, but the latter is too meagerly attested to support a meaningful comparison. Other languages of southern Baja are essentially undocumented, though people have speculated from non-linguistic sources that
Monqui (Monquí-Didiú), spoken in a small region around
Loreto, may have been a 'Guaicurian' language, as perhaps was Huchití (Uchití), though that may have actually been a variety of Guaycura itself (Golla 2007). The internal classification of Guaicurian (Waikurian) languages is uncertain. Massey (1949), cited in Campbell (1997:169), gives this tentative classification based on similarity judgments given by colonial-era sources, rather than actual linguistic data. •
Guaicurian (Waikurian) • Guaicura branch • Guaocura (Waikuri) • Callejue • Huchiti branch • Cora • Huchiti • Aripe • Periúe • Pericú branch • Pericú • Isleño However, Laylander (1997) and Zamponi (2004) conclude that Waikuri and
Pericú are unrelated. ==Phonology==