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Comment by donatj | Hacker News Reader

Can you explain further, I’m not sure I understand the objection. Doesn’t any language backwards become unintelligible to its readers? Doesn’t seem specific to Japanese.

How would you wish `ゃき` to reverse if not `きゃ`?

https://emoji.boats/s/きゃ

Seeing as they are both are normal runes with no modifiers attached, I don’t know what alternative there would be?

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I think my usage of the word "meaningful" was very much generous. Let me clarify my intention then: the "correctly" (that is, preferred by speakers) reversed text is unlikely to have a meaning, but it is still likely to adhere the language's phonotactic rules. ゃ (small ya, as opposed to ordinary や ya) is something you never expect to be the first character because it modifies the preceding syllable. The use of such small characters (すてがな sutegana) as the first character in words is very limited in Japanese.

I don’t think English is such that every sequence of letters is a valid encoding of phonemes, either.

I think it is only you who have a problem with it. Writing Japanese horizontally has only been a thing for about 100 years. About 100 years ago the direction Japanese was written horizontally was mixed between left to right and right to left.

Writing Japanese reversed aka right to left isn't a weird concept.

I'm aware that RTL Japanese was a thing. In fact, what you have described is not really RTL; its inline direction is top to bottom and its block direction is right to left [1] while what we typically refer to RTL is about the inline direction. RTL Japanese is actually a specific variation of this TTB/RTL writing where the line itself only consists of a single character. Very rare (typically signages), but it did exist.

But that doesn't mean your RTL text should be preemptitively reversed in the memory, which is exactly what the exercise asks you to do. Historically this was the case for some early character encoding, where the reversed text is called the "visual order" opposed to the "logical order". This caused enough problems that Unicode is now primarily the logical order only, except for a few scripts where the historical visual order is retained (e.g. Thai).

[1] See https://www.w3.org/TR/css-writing-modes-4/#text-flow for more information.

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