Răspuns:
certains, certaines = unii, unele => variabil
personne = nimeni => invariabil
on = (oamenii in general sau o singura pesoana nedeterminata) se, cineva ; (persoane bine determinate) je, tu il, elle etc. => invariabil
autre, autres = alt(a), alti(e) => variabil
tout, toute, tous, toutes = tot, toata, toti, toate => variabil