Very little research has been done on the earliest stages of phonological development in Italian.

This article primarily describes phonological development after the first year of life.

See the main article on phonological development for a description of first year stages.

It was, however, crucial for phonological developments in the daughter languages.

In some cases, phonological or semantic developments make the pairs difficult to recognize.

The following comments illustrate the phonological development within the period of Koine.

This phonological development has also been attributed to German influence.

Both approaches can also contribute to furthering children's phonological development.

Some phonological developments that have been used to establish the current classification are described here.

The concept of sound change covers both phonetic and phonological developments.