Peruvian Spanish has been spoken in Peru since 1532. There are four varieties spoken in the country, by about 80% of the population.
The Spanish language first arrived in what today is Peru in 1532. During colonial and early republican times, the Spanish spoken colloquially in the coast and in the cities of the highland possessed strong local features, but as a result of dialect leveling in favor of the standard language, the language of urban Peruvians today is more or less uniform in pronunciation throughout most of the country. Vestiges of the older dialect of the coast can be found in the speech of black Peruvians, which retains Andalusian features such as the aspiration or deletion of final /s/ and the deletion of final /r/. The dialect of Arequipa in its pure form is now extinct, although some elders are familiar with it.
Throughout most of the highland, Quechua continued to be the language of the majority until the mid 20th century. Mass migration (rural exodus) into Lima starting in the 1940s, and into other major cities and regional capitals later on, accompanied by discrimination and the growth of mass media, have reconfigured the linguistic demography of the country in favor of Spanish. The poor urban masses originating in this migration adopted the standardized dialect spoken in the cities, however with traces of Andean pronunciation and a simplified syntax.
Andean Spanish the most common dialect in the Andes (more marked in rural areas) and has many similarities with the "standard" dialect of Ecuador and Bolivia.
The phonology of Andean Peruvian Spanish is distinguished by its slow time and unique rhythm (grave accent), assibilation of /r/ and /ɾ/, and an apparent confusion of the vowels /e/ with /i/ and /o/ with /u/. (In reality, they are producing a sound between /e/ and /i/, and between /o/ and /u/.) Furthermore, the "s" (originally apical and without aspiration) is produced with more force than that of the coast; this is also generally true of the other consonants, at the loss of the vowels. Other distinctive features are the preservation of /ʎ/, sometimes hypercorrective realization of /ʝ/ as [ʎ], and the realization of velar plosives as a fricative [x].