> Aditya Mahajan <mailto:adityam@umich.edu>
> 5. Juni 2016 um 00:32
> Hi,
>
> I discovered this bug while answering a question on TeX.SX. Consider:
>
> \define\cyrdash{\dontleavehmode\scale[sx=0.80]{---}}
> \unprotect
> \setuplanguage
>   [\s!ru]
>   [
>     \c!midsentence=\cyrdash,
>     \c!leftsentence=\cyrdash,
>     \c!rightsentence=\cyrdash,
>   ]
> \protect
>
>
> \setupbodyfont[dejavu]
>
> \starttext
> Normal text|<|English
>
> \mainlanguage[ru]
> Normal text|<|Russian
> \stoptext
>
> The pdf shows:
>
> Normal text—English
> Normal text„Russian
>
> Why the quote instead of the emdash. The output is okay is if 
> \mainlanguage is set before |<| is used for the first time.
When subsentences are nested the inner group uses the leftsubsentence 
and rightsubsentence symbols.

\mainlanguage[ru]

\starttext
outer|<|inner|<|nested|>|inner|>|outer
\stoptext

Wolfgang