See an image that represents quixtiano in the Visual Lexicon of Aztec Hieroglyphs, ed. Stephanie Wood (Eugene, Ore.: Wired Humanities, 2020-present).
nichuiquilia ce quixtiano ytoca medina media fanega trigo = I owe to a Spaniard named Medina a half fanega of wheat (Saltillo, 1682)
Leslie S. Offutt, "Levels of Acculturation in Northeastern New Spain; San Esteban Testaments of the Seventeenth and Eighteenth Centuries," Estudios de cultura náhuatl 22 (1992), 409–443, see page 434–435.
amo tonahuac mocalaquis ma quixtiano ma mulato ma mestiso ma tliltic ma chino mo oncan tlatozque ynnahuac yn masehualtzitzintin = No Spaniard, mulatto, mesticzo, black, or chino was to enter among us; they were not to have a voice among the indigenous people.
Here in This Year: Seventeenth-Century Nahuatl Annals of the Tlaxcala-Puebla Valley, ed. and transl. Camilla Townsend, with an essay by James Lockhart (Stanford: Stanford University Press, 2010), 136–137.
"1531 Otlalmanque in quixtianotin cuetlaxcoapan Ciudad de los Ángeles" = "1531. The Christians [i.e., Spaniards] settled in Cuetlaxcohuapan, the City of the Angels [i.e., Puebla]."
Frances Krug, "The Nahuatl Annals of the Tlaxcala-Puebla Region," ch. 5, p. 29, Ph.D. Dissertation draft written in the 1980s, with transcriptions and translations approved by James Lockhart. Cited here by SW.