Principal English Translation: 

impersonal, like a passive ending for intransitive verbs or the true passive

Attestations from sources in English: 

In the past tense: -loc.
otlatlatlauhtilloc otlayahualoloc = there were prayers and processions
(central Mexico, 1615)
see Annals of His Time: Don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin, James Lockhart, Susan Schroeder, and Doris Namala, eds. and transl. (Stanford: Stanford University Press, 2006), 306–307.