and seven cases.
And it's wrong about grammatical gender.... Polish has 4 genders in the singular but only two in the plural (some put the two together and come up with 5 genders)
Most of Scandinavian just has two (common and neuter) but Norwegian has three (common, feminine and neuter).
Modern Romance just has two (masculine and feminine) Romanian has a syntactic neuter case (masc in singular fem in plural)
And that has nothing in common with social gender (roles)
Sex - biological category related to reproduction (humans just have two, male and female)
Gender - culturally bound stereotypes about how each of the two sex should behave