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Well as the Persian and Arabic alphabet are nearly identical, unicode doesn't appear to store two distinct copies, instead just storing one plus the additional characters for Persian.

Oddly though, it stores several copies of identical chinese characters. Traditional, simplified, and the Japanese loaned characters kanji.

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> Oddly though, it stores several copies of identical chinese characters. Traditional, simplified, and the Japanese loaned characters kanji.

Actually, all of those characters are usually unified into one code point. This is controversial enough on its own that there's a Wikipedia page on it: https://en.wikipedia.org/wiki/Han_unification

> Traditional, simplified, and the Japanese loaned characters kanji.

Traditional, simplified, Japanese, Korean. Some are identical, some different. I wonder why these rendering details were not left to fonts and you can type 雨 and ⾬ for example. Maybe stronger presence of those countries in whatever SDOs and tech integration has to do with it.

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