Palatalization in the Romance languages
Palatalization in the Romance languages encompasses various historical sound changes which caused consonants to develop a palatal articulation or secondary articulation, as well as certain further developments such as affrication. It resulted in the creation of several consonants that had not existed in Classical Latin, such as the Italian [t͡s d͡z ʃ t͡ʃ d͡ʒ ɲ ʎ].
Source: Wikipedia — Palatalization in the Romance languages (CC BY-SA 4.0)