Early Modern Spanish

Early Modern Spanish is the variant of Spanish used between the end of the 15th century and the end of the 17th century, marked by a series of phonological and grammatical changes that transformed Old Spanish into Modern Spanish.
Notable changes from Old Spanish to Early Modern Spanish include: a readjustment of the sibilants, the phonemic merger known as yeísmo, the rise of new second-person pronouns, the emergence of the "se lo" construction for the sequence of third-person indirect and direct object pronouns, and new restrictions on the order of clitic pronouns.
Early Modern Spanish corresponds to the period of Spanish colonization of the Americas, and thus it forms the historical basis of all varieties of New World Spanish. Meanwhile, Judaeo-Spanish preserves some archaisms of Old Spanish that disappeared from the rest of the variants, such as the presence of voiced sibilants and the maintenance of the phonemes and.
Early Modern Spanish, however, was not uniform throughout the Spanish-speaking regions of Spain. Each change has its own chronology and, in some cases, geography. Slightly different pronunciations existed simultaneously. The Spanish spoken in Toledo was taken as the "best" variety and was different from that of Madrid.

Phonology

From the late 16th century to the mid-17th century, the voiced sibilants,, lost their voicing and merged with their respective voiceless counterparts: laminal, apical, and palatal, resulting in the phonemic inventory shown below:

The phoneme progressively became silent in most areas, though it still exists for some words in varieties of Andalusia and Extremadura. In several modern dialects, the sound is the realization of the phoneme ; additionally, in many dialects it exists as a result of the debuccalization of in syllabic coda.
In the Americas, the Canary Islands, and almost all of Andalusia, the apical merged with laminal . Some authors use the transcription and for and/or for.
Many dialects have lost the distinction between the phonemes and in a merger, called yeísmo. Both phonemes have remained separate in parts of the Iberian Peninsula and in parts of South America, mainly in Bolivia, Paraguay, and Peru.

Grammar

A readjustment of the second-person pronouns differentiates Modern Spanish from Old Spanish. To eliminate the ambiguity of the form vos, which served for both the second-person singular formal and the second-person plural, two alternative forms were created:
* The form usted as a form of respect in the second-person singular.
* The form vosotros as a usual form of second-person plural. In parts of Andalusia, in the Canary Islands, and in the Americas, however, the form did not take hold, and the form ustedes came to be used for both the formal and the informal second-person plural.
The loss of the phoneme —through a merger with —caused the medieval forms gelo, gela, gelos, gelas to be reinterpreted as se lo, se la, se los, se las, as in digelo 'I gave it to him/her' > Early Modern Spanish díselo > Modern Spanish se lo di.
In Early Modern Spanish, clitic pronouns were still often suffixed to a finite verb form, as in Portuguese, but they began to alternate with preverbal forms, which became the norm in Modern Spanish: enfermose and muriose > se enfermó and se murió.

Spelling

Spelling in Early Modern Spanish was anarchic, unlike the Spanish of today, which is governed and standardized by the Real Academia Española, a semi-governmental body. There was no reference book or other authority writers or compositors could turn to, to find the "correct" spelling of a word. In fact, spelling was not considered very important. Sometimes words were spelled according to their Latin origin, rather than their actual pronunciation. That presents a challenge to modern editors of texts from the period, who are forced to choose what spelling to use.
The radical proposals of were not adopted.