This paper compares the inflectional diversity and density of adjectives and verbs in French CS, CDS, and ADS samples in a social perspective. The aim of the study is to show that the relation between CS, CDS, and ADS is not identical as far as verb and adjective inflection is concerned. We firstly expected verb inflectional morphology to be less diverse and dense in CDS and CS than in ADS. Conversely, we predicted adjective inflectional diversity and density to be higher in CDS and CS. Interestingly the findings do not exactly match the first prediction. The social implications of the study are discussed.