Check \the\catcode"200D perhaps, it does not seem to be set in your example
document. Note that the LaTeX format might reset that catcode.
The other mystery is why Arabic words seem to only be hyphenated once.
On 3/25/21 5:17 PM, Yannis Haralambous wrote:
> Well it is neither polyglossia nor fontspec, because I have ran the following
> file:
>
> \documentclass{article}
> \textwidth1mm
> \begin{document}
> \font\arabicfont="[./Amiri-Regular.ttf]"
>
> \lefthyphenmin1
> \righthyphenmin1
>
> \makeatletter\language\l@arabic
> \arabicfont
>
> ^^^^0643^^^^200d^^^^200d^^^^0643^^^^200d^^^^200d^^^^0643^^^^200d^^^^200d^^^^0643^^^^200d^^^^200d^^^^0643
> ^^^^0643^^^^200d^^^^200d^^^^0643^^^^200d^^^^200d^^^^0643^^^^200d^^^^200d^^^^0643^^^^200d^^^^200d^^^^0643
> ^^^^0643^^^^0643^^^^0643^^^^0643^^^^0643
> ^^^^0643^^^^0643^^^^0643^^^^0643^^^^0643
>
> \end{document}
>
> and still get that odd behavior: between ^^^^0643 I get flawless hyphenation
> but
> not between ^^^^200d
>
> My patterns are \patterns{^^^^0643^^^^200d1^^^^200d^^^^0643
> ^^^^06431^^^^0643
> ^^^^200d1^^^^200d
> }
>
> I'm attaching my xelatex.log file, do you see any file that can have affected
> the behavior of ^^^^200d?
>
>
>
>> Le 25 mars 2021 à 12:55, Jonathan Kew <jfkth...@gmail.com
>> <mailto:jfkth...@gmail.com>> a écrit :
>>
>> On 25/03/2021 11:37, Yannis Haralambous wrote:
>>> OK, this may be a bug, but it doesn't explain why in polyglossia+fontspec I
>>> get no hyphenation at all. I should get at least one hyphenation in each
>>> word, no?
>>
>> My guess is that polyglossia (or something else in latex?) thinks it knows
>> best how to handle U+200D and is getting in your way.
>
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