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Re: Questions concerning hyphenation patterns for non-Latin languages, e

From: Oliver Corff
Subject: Re: Questions concerning hyphenation patterns for non-Latin languages, e.g. Russian
Date: Tue, 25 Apr 2023 16:25:49 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.0

Hi Branden,

Now I am considering modifying an existing TeX hyphenation file for
groff use.
Wait!  Before you do that, check out the post-1.23.0 branch in groff
Git, where this has already been done!

In the meantime, I had a look at that Russian hyphenation file, and to
my relief, the structure of the groff hyphenation pattern files is that
of TeX hyphenation pattern files, which I have worked on before.

But... the hyphenation file in the aforementioned source is
not usable in the current set-up because the Russian syllable fragments
are encoded in KOI-8, an 8 bit encoding based on a GOST Standard of the

So, it does not match the internal code representation of Unicode code

Since groff internally seems to work with Unicode code positions, the
question is: in which format should the hyphenation patterns be
presented to groff? As-is, that is as utf8 text, or in \[u04xx] form?
That does not seem to work either, according to my last experiment.

Best regards,


Dr. Oliver Corff
Wittelsbacherstr. 5A

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