But that's human gender, not noun gender. In grammar, gender is a class of noun and generally unrelated to human gender. In German, words like "library" (Bibli

But that's human gender, not noun gender. In grammar, gender is a class of noun and generally unrelated to human gender. In German, words like "library" (Bibliothek) and "street" (Strasse/Straße) are feminine, for example. It's true that some feminine words, such as "woman" (Frau) and "mother" (Mutter), are feminine. But then you have words like "girl" (Mädchen), which are not. Your example ("she did") could actually have ambiguity in languages that extends the noun gender to pronouns, such as French. "She" doesn't need to refer to a woman, just a feminine noun. For example, "car" (voiture) is feminine, and you can refer to "it" as "elle" (she).