Here's why:
* Language Diversity: Different languages have different grammatical structures and ways of marking gender. Some languages use suffixes, prefixes, or internal vowel changes to distinguish feminine nouns and adjectives.
* No Universal Rule: Even within a single language, there are exceptions and inconsistencies. Some feminine adjectives might not end in any particular letter.
* Gender-Neutral Forms: Many languages are moving towards more gender-neutral language, reducing the reliance on grammatical gender distinctions.
Example:
* French: Feminine adjectives often end in "-e" (e.g., "belle" - beautiful), but there are exceptions.
* Spanish: Feminine adjectives often end in "-a" (e.g., "bonita" - pretty), but again, there are exceptions.
* English: English doesn't have grammatical gender for nouns or adjectives, making this question irrelevant.
Instead of focusing on a specific letter, it's better to learn the grammatical rules for each language you're studying.