English versus French grammar
Solution 1:
Conjugation is for verbs. "Sex" (male and female) is a characteristic of living things. "Gender" (masculine and feminine), the association of words with one sex or the other (or neither) is a characteristic of words in some languages. Except for pronouns, English doesn't assign a gender to to words, i.e., the language doesn't have different forms for nouns and adjectives based on gender. Note that this is different from having separate words to describe the sex associated with the word, e.g., "waitress" for a woman who waits tables and "waiter" for a man.
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