[luatex] Setting language inside nodelist

[Patrick Gundlach]

Hello again...

I try to set the language inside a nodelist. Let's say I have done  
something like

l=lang.new()
l:patterns([==[
... for example german hyphenation patterns ..
]==])
l:id()  -- returns 1

Now \language1 switches to the german hyphenation patterns.

But when I go thru the nodelist with the pre_linebreak_filter, it is  
not enough to set the lang fields in the glyph nodes to 1. I have to  
explicitly say \language1 in my TeX text. Why is this? There are no  
other nodes where I can set the lang field.

How do I switch to another language completely inside the  
pre_linebreak_filter?

Patrick