R package CoModes: a package for clustering categorical data. CoModes is a tool for clustering categorical data. The clustering goal is achieved by a mixture model which considers the intra-class dependencies since the observed variables are grouped into conditionally independent blocks. The block distribution is parsimonious since each block follows a multinomial distribution per modes. Under this distribution, the free parameters correspond to the probabilities of the most probable levels (the modes) while the other levels (the non modes) are assumed to be equiprobable.