Uwe Stöhr wrote:
> >> It seems that LuaTeX is in general limited to Roman scripts for now.
> > 
> > I think that's not true. There are packages such as lautex-ja (Japanese in
> > at least basic Chinese) and luatex-ko (Korean). Also, most recent
> > polyglossia introduces support for luatex, although it is still
> > experimental and might not work with all languages.
> 
> The list of known languages/scripts that does _not_ work with the latest
> LuaTeX (version 0.76 that  is part of the upcoming TeXLive 2013) I added to
> http://wiki.lyx.org/LyX/LuaTeX

Granted, but this is not equal with your sweeping statement that "LuaTeX is in 
general limited to Roman scripts".

> Therefore I don't like that we default to dviluatex when the user checks the
> "use non-TeX" fonts  option in the document settings. XeTeX is now almost
> ready (except of some expert microtypography features) and LuaTeX is
> apparently not. So we should default to XeTeX.

We do not "default" to dvilualatex. The problem is that we do not yet have 
support for a "OpenType" default backend, so LyX takes the first in the 
alphabetical list, which just happens to be dvilualatex.

We should let the user decide. As much as you personally prefer XeTeX over 
LuaTeX, other users might have a different preference.

Jürgen

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