Castilian of the Balearic Isles can be analyzed under a point of view of languages in contact. We appreciate this as in the sphere of the individual that uses both languages for communicative purposes, as in the sphere of a society where, in a diglosic way, exists the tendency to employ one tongue or another, taking into account sociolinguistics parameters (home, vicinty, work, administration, mass-media) and where Castilian language is still associated with the sociopolitical and cultural groups of prestige. From the real proves of usage taken along the fieldwork that we have carried out with the scholastic community of the Public School «Es Puig» from Sóller (Balearic-Isles) we have obtained series of phonetics features which sho...