Isogloss map for /s/ and /z/ distinction in Iberian Peninsula Spanish, according to ALPI .
This is one of the basic markers of dialectal boundaries in Spain, along with s aspiration. The common terms "ceceo" and "seseo" must be conmplemented with "ceseo", a name that some authors have coined to refer to the distinction of the /s/ and /z/ phonemes, standard in most of Spain. This latter term is not common, though. The distinction of /s/ and /z/ seems to be expanding in the Peninsula, and probably has been doing so for centuries.
The words registered in the ALPI surveys that have been used in this map are :
Zone A : Points where both prevowel /z/ and prevowel /s/ are pronounced interdental ("ceceo").
Zone B : Points where both prevowel /z/ and prevowel /s/ are pronounced sibilant ("seseo").
Zone C : Points where prevowel /z/ and prevowel /s/ are pronounced differently ("ceseo").
Zone D : Other languages. Zones where historically Spanish is not the local language.
Index of Maps : Isogloss maps for Iberian Peninsula Spanish, according to ALPI
Versión en español : Mapa de isoglosas para la distinción de /s/ y /z/ en el castellano de la península Ibérica, a partir del ALPI
External link (in Spanish) with a Map of "ceceo" and "seseo", only for Andalusia : Andalucía ceceante y seseante
If you have any question or comment about this page, please send it to