Summary

The history of inflection classes in nouns and adjectives in the Romance languages involves a number of changes, which most often imply the loss of distinctions (loss of features such as case, loss of values such as the neuter gender, or loss of inflection class distinctions), but which can also imply a multiplication of new distinctions (features of predication or position, development of new inflection class distinctions based on the phonology of nouns). Class distinctions have often been said to be marked by final vowel distinctions, but it is not always so, and a number of systems present classes while having lost most final vowels.