English-Vietnamese facing pages

[jbf via ntg-context <ntg-context@ntg.nl>]

Am always up for a challenge, but hope this one is not beyond my 
possibilities! Have a request to produce a book with English-Vietnamese 
facing pages. The text doesn't have to be strictly in sync, but 
generally so. The only ConTeXt guidelines I think I have at the moment 
are (1) an old module called m-streams (which I am assuming is now 
obsolete), and (2) an exchange of emails on this list over a decade 
about bilingual typesetting.

It won't bother me too much if I have to tell the intending author and 
his editor that this might be beyond me, but before taking that stance, 
I have a couple of simple questions that someone might be able to 
respond to. And, BTW, the Vietnamese font is not the problem. Tex Gyre 
Pagella seems to be able to cope with that at least!

Q 1: Has anybody reading this actually produced a bilingual book (it 
doesn't have to be en-vn) with ConTeXt? And if so would you be prepared 
to offer me some basic guidelines?

Q 2: There is some guidance from Wolfgang on 
https://wiki.contextgarden.net/Columns towards the end of that page. I 
tried two or three pages of the first chapter of the book, placing 
English in outputstream[one] and the Vietnamese in outputstream[two] and 
kind of got a suitable result except that the last paragraph of both 
languages ended up BEFORE the chapter began. No idea why. The rest 
seemed okay. So my question is whether or not Wolfgang's sample (where 
he says 'a simple example but I had to write the splitter myself') would 
be sufficient for me to put the book together?

Q 2: I suppose the third question is whether, since LMTX, there has been 
any further development in the 'streams' mechanism that might help me?

Julian

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