[EMAIL PROTECTED] (Jürgen Spitzmüller) writes:

> As far as I know, rc.language_command_begin is used, and this is 
> configurable. 
> So if your LaTeX file contains \selectlanguage, and the user has defined 
> \begin{otherlanguage*} and \end{otherlanguage*}, those are used instead.

Yes, but if a .tex document contains a \selectlanguage, since the
document is supposed to be valid, we can assume that this
selectlanguage does a language change. Similarly
\begin{otherlanguage*} is a language change too.

I think rc.language_command_begin is irrelevant.

JMarc

> language_command_begin and language_command_end are in the sources since at 
> least 2000, so I doubt they have been introduced for arabtex.

I think they were introduced by Dekel for hebrew/arabic support.

JMarc

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