On 22 Mar 2017, at 21:39, David Starner <prosfil...@gmail.com> wrote:
> 
> Does "Яussia" require a new Latin letter because the way R was written has a 
> different origin than the normal R? 

But it doesn’t. It’s the Latin letter R turned backwards by a designer for a 
logo. We wouldn’t encode that, because it’s a logo. 

> There's huge variation in Latin script including all sorts of different 
> glyphs, and I suspect Яussia is way more common than any use of the Deseret 
> script.

In order to represent that logo, people use the Cyrillic letter Я, as you know. 

> There's the same characters here, written in different ways.

No, it’s not. Its the same diphthong (a sound) written with different letters. 

> The glyphs may come from a different origin, but it's encoding the same idea.

We don’t encode diphthongs. We encode the elements of writing systems. The 
“idea” here is represented by one ligature of 𐐆 + 𐐅 (1855 EW), one ligature of 
𐐆 + 𐐋 (1859 EW), one ligature of 𐐉 + 𐐆 (1855 OI), and one ligature of 𐐃 + 𐐆 
(1859 OI).

Those ligatures are not glyph variants of one another. You might as well say 
that Æ and Œ are glyph variants of one another. 

> If a user community considers them separate, then they should be separated, 
> but I don't see that happening, and from an idealistic perspective, I think 
> they're platonically the same.

I do not agree with that analysis. The ligatures and their constituent parts 
are distinct and distinctive. In fact, it might have been that the choice for 
revision was to improve the underlying phonology. In any case, there’s no way 
that the bottom pair in 
https://en.wikipedia.org/wiki/Deseret_alphabet#/media/File:Deseret_glyphs_ew_and_oi_transformation_from_1855_to_1859.svg
 can be considered to be “glyph variants” of the top pair. Usage is one thing. 
Character identity is another. Æ is not Œ. A ligature of 𐐆 + 𐐅 is not a 
ligature of 𐐆 + 𐐋. 

Michael Everson

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