Classical Nahuatl is one of the Nahuan languages within the Uto-Aztecan family. It is classified as a central dialect and is most closely related to the modern dialects of Nahuatl spoken in the valley of Mexico in colonial and modern times. It is probable that the Classical Nahuatl documented by 16th- and 17th-century written sources represents a particularly prestigious sociolect. That is to say, the variety of Nahuatl recorded in these documents is most likely to be more particularly representative of the speech of Aztec nobles, while the commoners spoke a somewhat different variety.
Phonology
Vowels
Consonants
Accent
generally falls on the penultimate syllable. The one exception is the vocative case. When used by men it has the suffix -e, where stress falls on the final syllable, e.g. Cuāuhtliquetzqui, but Cuāuhtliquetzqué "O Cuauhtliquetzqui!" When women use the vocative, the stress is shifted to the final syllable without adding any suffix. "Oquichtli" means "man", and "Oquichtlí" means "O man!"
Phonotactics
Maximally complex Nahuatl syllables are of the form CVC; that is, there can be at most one consonantat the beginning and end of every syllable. In contrast, English, for example, allows up to three consonants syllable-initially and up to four consonants to occur at the end of syllables . Consonant clusters are only allowed word-medially, Nahuatl uses processes of both epenthesis and deletion to deal with this constraint. For such purposes, tl'', like all other affricates, is treated as a single sound, and not all consonants can occur in both syllable-initial and syllable-final position.
Grammar
Writing system
At the time of the Spanish conquest, Aztec writing used mostly pictograms supplemented with a few ideograms. When needed, it also used syllabic equivalences; Diego Durán recorded how the tlacuilos could render a prayer in Latin using this system but it was difficult to use. The writing system was adequate for keeping such records as genealogies, astronomical information, and tribute lists, but it could not represent a full vocabulary of spoken language in the way that the writing systems of the Old World or the Maya civilization's script could. The Spanish introduced the Latin script, which was then used to record a large body of Aztec prose and poetry, which somewhat diminished the devastating loss caused by the burning of thousands of Aztec codices by the Spanish authorities. On the :nah:|Nahuatl edition of Wikipedia, the language is written in a Latin script, including four letters with macrons or long vowels: ā, ē, ī, ō. Many other foreign letters such as b or k are used only in foreign names, such as in Francitlān. The orthography used there is outlined below:
a c ch cu e hu i l* m n o p qu t tl tz x y z ā ē ī ō ll* h*
Notes:
Letters above marked with an asterisk have no capital forms except in foreign names.
Like in Spanish, is written as, except before or in which case is used. Likewise, is written as, except before or, in which case is used. However, is always written as.
and, which represent and respectively, are inverted to and at the end of a syllable.
* The letter is used only in digraphs, as the Nahuatl language lacks an, distinct from.
represents a glottal stop, a sort of pause caused by constricting the throat, as in uh-oh.
Literature
is extensive, including a relatively large corpus of poetry. The Huei tlamahuiçoltica is an excellent early sample of literary Nahuatl. A bilingual dictionary with Spanish was first published in 1611, Vocabulario manual de las lenguas castellana y mexicana and is "the most important and most frequently reprinted Spanish work on Nahuatl," according to the World Digital Library. Now, Classical Nahuatl is used by black metal groups of Mexico supporting indigenismo, such as Kukulcan, Tlateotocani and Comando de Exterminio.